chore(ci): extend timestamp on flaky test decorator for grpc

[quinna-h]

Extend flaky expiration date for flaky grpc test until 1767220930 (12/31/25)

notes:
If gitlab does not support ipv6, and we do not when this will change, long-term we should either

1. change to use a different protocol that is supported
2. remove the test entirely

Checklist

• PR author has checked that all the criteria below are met
• The PR description includes an overview of the change
• The PR description articulates the motivation for the change
• The change includes tests OR the PR description describes a testing strategy
• The PR description notes risks associated with the change, if any
• Newly-added code is easy to change
• The change follows the library release note guidelines
• The change includes or references documentation updates if necessary
• Backport labels are set (if applicable)

Reviewer Checklist

• Reviewer has checked that all the criteria below are met
• Title is accurate
• All changes are related to the pull request's stated goal
• Avoids breaking API changes
• Testing strategy adequately addresses listed risks
• Newly-added code is easy to change
• Release note makes sense to a user of the library
• If necessary, author has acknowledged and discussed the performance implications of this PR as reported in the benchmarks PR comment
• Backport labels are set in a manner that is consistent with the release branch maintenance policy

[github-actions]

CODEOWNERS have been resolved as:

tests/contrib/grpc/test_grpc.py                                         @DataDog/apm-idm-python @DataDog/asm-python

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-02-21 22:51:34

Comparing candidate commit 820a713 in PR branch quinna.halim/grpc-flaky-test with baseline commit 6bf9381 in branch main.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 418 metrics, 2 unstable metrics.

[wantsui]

🙏 let's hope they add support eventually