SCANPY-242 Improved releasability workflow

[marc-jasper-sonarsource]

No description provided.

[hashicorp-vault-sonar-prod]

SCANPY-242

[sonar-review-alpha]

Summary

Migrated releasability workflow from Cirrus CI check_suite trigger to GitHub's native workflow_run trigger, triggered by the Build workflow completion. Updated the releasability action from v2 to v3. The change simplifies the trigger condition from complex Cirrus CI checks to a straightforward workflow success check, while adding explicit branch filtering (master, branch-, dogfood-).

What reviewers should know

Review the trigger mechanism: Previously relied on external Cirrus CI webhooks, now uses GitHub's native workflow_run event from the Build workflow. The condition logic is significantly simpler — focus on whether github.event.workflow_run.conclusion == 'success' correctly captures when releasability checks should run. Verify the branch filters match the intended release branches. The action upgrade to v3 is straightforward; check the changelog if concerned about breaking changes.

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[sonarqube-next]

Quality Gate passed for 'Python Scanner'

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
0 Dependency risks
No data about Coverage
No data about Duplication

See analysis details on SonarQube

[Seppli11]

LGTM!