chore(frontend): deduplicate generated OpenAPI runtime and model files

[jeffspahr]

Summary

• deduplicate generated OpenAPI support by moving shared runtime.ts, ProtobufAny.ts, and GooglerpcStatus.ts files into frontend/src/generated/openapi and frontend/server/src/generated/openapi
• rewrite per-surface generated support files into thin re-export shims so existing generated import paths stay stable
• validate the shared-support invariant during generation so divergent targets fail deterministically instead of silently clobbering shared output
• add generator coverage for both the dedupe pass and the mismatch guard, and update the generated-files documentation

Testing

• cd frontend && npm test -- scripts/generate_openapi_typescript_fetch.test.js
• cd frontend && npm run apis:all
• cd frontend && npm run apis:run
• cd frontend && npm run lint
• cd frontend && npm run typecheck (still fails on current origin/master due existing JSX namespace / MLMD ref typing errors unrelated to this diff)

Fixes #12957.

[Copilot]

Pull request overview

This PR reduces duplicated OpenAPI Generator output by extracting the common runtime.ts, ProtobufAny.ts, and GooglerpcStatus.ts into shared generated modules, while keeping existing per-surface import paths stable via thin re-export shims. It also updates the OpenAPI generation script to perform the dedupe as a post-generation step, adds unit test coverage for that behavior, and updates generated-files documentation.

Changes:

• Add shared generated OpenAPI support modules under frontend/src/generated/openapi and frontend/server/src/generated/openapi.
• Replace per-surface generated support files with re-export shims to preserve existing import paths.
• Add/extend generator script logic + tests to implement and validate the dedupe step; update AGENTS.md generated-files docs.

Reviewed changes

Copilot reviewed 39 out of 51 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
frontend/src/generated/openapi/models/ProtobufAny.ts	New shared client-side generated support model.
frontend/src/generated/openapi/models/GooglerpcStatus.ts	New shared client-side generated support model.
frontend/server/src/generated/openapi/models/ProtobufAny.ts	New shared server-side generated support model (Node ESM import specifiers).
frontend/server/src/generated/openapi/models/GooglerpcStatus.ts	New shared server-side generated support model (Node ESM import specifiers).
frontend/src/apisv2beta1/visualization/models/ProtobufAny.ts	Replace per-surface model with re-export shim to shared client support.
frontend/src/apisv2beta1/visualization/models/GooglerpcStatus.ts	Replace per-surface model with re-export shim to shared client support.
frontend/src/apisv2beta1/run/runtime.ts	Replace per-surface runtime with re-export shim to shared client runtime.
frontend/src/apisv2beta1/run/models/ProtobufAny.ts	Replace per-surface model with re-export shim to shared client support.
frontend/src/apisv2beta1/run/models/GooglerpcStatus.ts	Replace per-surface model with re-export shim to shared client support.
frontend/src/apisv2beta1/recurringrun/models/ProtobufAny.ts	Replace per-surface model with re-export shim to shared client support.
frontend/src/apisv2beta1/recurringrun/models/GooglerpcStatus.ts	Replace per-surface model with re-export shim to shared client support.
frontend/src/apisv2beta1/pipeline/runtime.ts	Replace per-surface runtime with re-export shim to shared client runtime.
frontend/src/apisv2beta1/pipeline/models/ProtobufAny.ts	Replace per-surface model with re-export shim to shared client support.
frontend/src/apisv2beta1/pipeline/models/GooglerpcStatus.ts	Replace per-surface model with re-export shim to shared client support.
frontend/src/apisv2beta1/filter/runtime.ts	Replace per-surface runtime with re-export shim to shared client runtime.
frontend/src/apisv2beta1/filter/models/ProtobufAny.ts	Replace per-surface model with re-export shim to shared client support.
frontend/src/apisv2beta1/filter/models/GooglerpcStatus.ts	Replace per-surface model with re-export shim to shared client support.
frontend/src/apisv2beta1/experiment/runtime.ts	Replace per-surface runtime with re-export shim to shared client runtime.
frontend/src/apisv2beta1/experiment/models/ProtobufAny.ts	Replace per-surface model with re-export shim to shared client support.
frontend/src/apisv2beta1/experiment/models/GooglerpcStatus.ts	Replace per-surface model with re-export shim to shared client support.
frontend/src/apis/visualization/runtime.ts	Replace per-surface runtime with re-export shim to shared client runtime.
frontend/src/apis/visualization/models/ProtobufAny.ts	Replace per-surface model with re-export shim to shared client support.
frontend/src/apis/visualization/models/GooglerpcStatus.ts	Replace per-surface model with re-export shim to shared client support.
frontend/src/apis/run/runtime.ts	Replace per-surface runtime with re-export shim to shared client runtime.
frontend/src/apis/run/models/ProtobufAny.ts	Replace per-surface model with re-export shim to shared client support.
frontend/src/apis/run/models/GooglerpcStatus.ts	Replace per-surface model with re-export shim to shared client support.
frontend/src/apis/pipeline/runtime.ts	Replace per-surface runtime with re-export shim to shared client runtime.
frontend/src/apis/pipeline/models/ProtobufAny.ts	Replace per-surface model with re-export shim to shared client support.
frontend/src/apis/pipeline/models/GooglerpcStatus.ts	Replace per-surface model with re-export shim to shared client support.
frontend/src/apis/job/runtime.ts	Replace per-surface runtime with re-export shim to shared client runtime.
frontend/src/apis/job/models/ProtobufAny.ts	Replace per-surface model with re-export shim to shared client support.
frontend/src/apis/job/models/GooglerpcStatus.ts	Replace per-surface model with re-export shim to shared client support.
frontend/src/apis/filter/runtime.ts	Replace per-surface runtime with re-export shim to shared client runtime.
frontend/src/apis/filter/models/ProtobufAny.ts	Replace per-surface model with re-export shim to shared client support.
frontend/src/apis/filter/models/GooglerpcStatus.ts	Replace per-surface model with re-export shim to shared client support.
frontend/src/apis/experiment/runtime.ts	Replace per-surface runtime with re-export shim to shared client runtime.
frontend/src/apis/experiment/models/ProtobufAny.ts	Replace per-surface model with re-export shim to shared client support.
frontend/src/apis/experiment/models/GooglerpcStatus.ts	Replace per-surface model with re-export shim to shared client support.
frontend/server/src/generated/apisv2beta1/auth/models/ProtobufAny.ts	Replace per-surface server model with re-export shim to shared server support.
frontend/server/src/generated/apisv2beta1/auth/models/GooglerpcStatus.ts	Replace per-surface server model with re-export shim to shared server support.
frontend/server/src/generated/apis/auth/models/ProtobufAny.ts	Replace per-surface server model with re-export shim to shared server support.
frontend/server/src/generated/apis/auth/models/GooglerpcStatus.ts	Replace per-surface server model with re-export shim to shared server support.
frontend/scripts/generate_openapi_typescript_fetch.test.js	Add unit tests for shared-support normalization and shim rewriting.
frontend/scripts/generate_openapi_typescript_fetch.js	Implement shared-support extraction + rewrite shims + format shared dirs.
AGENTS.md	Update generated-files documentation to reflect shared OpenAPI support locations.

[manaswinidas]

/ci-passed

[manaswinidas]

/lgtm

[droctothorpe]

/approve
/lgtm

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: droctothorpe

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[jsonmp-k8]

/ok-to-test

[manaswinidas]

/lgtm