Add Staged Artifact validations for RunnerV2

[tarun-google]

Adding Staged Artifact validations for RunnerV2. We currently disable this feature with disable_staged_file_integrity_checks(Note:currently rolled out to all regions). SDK already uploads these sha256 during the submission for RunnerV2. So, no need to make any changes in Job Submission

Fixes:

1. Java and Python staged artifacts validation for RunnerV2
2. Added the feature for typescript materialize too.
3. Golang legacy flow get the hash from workerHarness. SDK already does the validations. So, the fix should be from worker. Added the disable flag for safety again.
4. Golang logging fix

Next Fix:
Staged pipeline validation.

Test Java:(Adding custom log for test)

Test Python :(Adding custom log for test)

Test Golang(Adding custom log for test)

GitHub Actions Tests Status (on master branch)

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[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the security and reliability of artifact staging for RunnerV2 by introducing mandatory SHA256 integrity checks. To maintain flexibility, a new experiment flag has been added that allows users to disable these checks if required. The changes span across multiple SDKs and the worker harness to ensure consistent behavior during job execution.

Highlights

• Staged Artifact Validation: Implemented SHA256 integrity validation for staged artifacts in RunnerV2 across Java, Python, and Go SDKs to ensure artifact consistency.
• Safety Mechanism: Introduced a 'disable_integrity_checks' experiment flag to allow users to bypass these validations if necessary.
• Context Injection: Updated container boot processes to inject pipeline options into the context, enabling the worker harness to access the new validation flag.

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[github-actions]

Checks are failing. Will not request review until checks are succeeding. If you'd like to override that behavior, comment assign set of reviewers

[tarun-google]

R: @Abacn @tvalentyn @kennknowles

[github-actions]

Stopping reviewer notifications for this pull request: review requested by someone other than the bot, ceding control. If you'd like to restart, comment assign set of reviewers

[Abacn]

A general notes, there are many components involved here. If there is a planned beam/model proto addition, it usually needs to go first as Dataflow backend needs to be updated with new proto

[tarun-google]

@Abacn @kennknowles This PR is ready for review(server is fully rolled out). Failing tests are not relevant

[tvalentyn]

/gemini review

[gemini-code-assist]

Code Review

This pull request implements artifact integrity validation by verifying SHA256 hashes during the retrieval process across the Go, Java, Python, and TypeScript SDKs. It introduces a mechanism to inject pipeline options into the context and provides a new experiment flag, disable_staged_file_integrity_checks, to bypass validation when necessary. Feedback focuses on improving the robustness of experiment parsing by combining legacy and URN-style options, optimizing performance by caching the experiments list to avoid repeated proto traversals, and reducing log noise during successful artifact validations.

[tarun-google]

Fixed suggestions and re-tested. Thanks!