chore(deps): Bump gRPC to v1.81.0

[vladbologa]

Description

Update gRPC from v1.80.0 → v1.81.0 and protobuf from v31.1 → v33.5

This will enable ML-KEM key exchange algorithm support for PQC in Collector.

Checklist

• Investigated and inspected CI test results
• Updated documentation accordingly

Automated testing

• Added unit tests
• Added integration tests
• Added regression tests

If any of these don't apply, please comment below.

Testing Performed

CI is sufficient.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 27.34%. Comparing base (d461f49) to head (6ed2c98).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3368   +/-   ##
=======================================
  Coverage   27.34%   27.34%           
=======================================
  Files          95       95           
  Lines        5420     5420           
  Branches     2545     2545           
=======================================
  Hits         1482     1482           
  Misses       3211     3211           
  Partials      727      727           

Flag	Coverage Δ
collector-unit-tests	27.34% <ø> (ø)

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[coderabbitai]

📝 Walkthrough

Walkthrough

This PR updates dependency versions for gRPC and Protobuf. The version script pins are bumped (gRPC v1.80.0 → v1.81.0, Protobuf v31.1 → v33.5), and the corresponding Git submodule and subproject pointers are updated to match.

Changes

Dependency Version Bump: gRPC and Protobuf

Layer / File(s)	Summary
Dependency version pins and submodule updates builder/install/versions.sh, builder/third_party/grpc, builder/third_party/protobuf	Version script exports are bumped (GRPC_REVISION v1.80.0 → v1.81.0, PROTOBUF_VERSION v31.1 → v33.5) and the gRPC and Protobuf submodule pointers are updated to new commit SHAs to match.

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🎯 2 (Simple) | ⏱️ ~10 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarizes the main change: bumping gRPC to v1.81.0. It is concise and clear.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description check	✅ Passed	The PR description includes a brief explanation of the dependency update and its purpose, but the Testing Performed section is only partially completed with a generic statement.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch vb/bump-grpc-1.81

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[vladbologa]

@coderabbitai review

[coderabbitai]

✅ Actions performed

Review triggered.

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[github-actions]

/retest collector-on-push

[github-actions]

/retest collector-on-push

[github-actions]

/retest collector-on-push

[vladbologa]

/retest collector-on-push

[Molter73]

LGTM! But you will probably need to wait for quay.io to come back online before you are able to test changes properly.

[vladbologa]

/retest collector-on-push