chore(ci): Remove trivy - pipelines

[sameerdattav]

Removing trivy action - as instructed by @andreyvelich following kubeflow/katib#2644

[google-oss-prow]

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[google-oss-prow]

Hi @sameerdattav. Thanks for your PR.

I'm waiting for a kubeflow member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[Copilot]

Pull request overview

Removes the scheduled Trivy GitHub Actions workflow from the repository CI, aligning with the instruction referenced in the PR description.

Changes:

• Deleted .github/workflows/trivy.yml, which previously ran a scheduled Trivy filesystem scan and uploaded SARIF results.