Add more tests for partition metrics

[qyryq]

Changelog entry

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Description for reviewers

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[github-actions]

🟢 2025-12-23 14:50:01 UTC The validation of the Pull Request description is successful.

[ydbot]

Run Extra Tests

Run additional tests for this PR. You can customize:

• Test Size: small, medium, large (default: all)
• Test Targets: any directory path (default: ydb/)
• Sanitizers: ASAN, MSAN, TSAN
• Coredumps: enable for debugging (default: off)
• Additional args: custom ya make arguments

[github-actions]

⚪ 2025-12-23 14:50:51 UTC Pre-commit check linux-x86_64-release-asan for 5333fed has started.
⚪ 2025-12-23 14:51:26 UTC Artifacts will be uploaded here
⚪ 2025-12-23 14:53:19 UTC ya make is running...
🟢 2025-12-23 14:58:17 UTC Tests successful.

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
276	276	0	0	0	0

🟢 2025-12-23 14:58:23 UTC Build successful.

[github-actions]

⚪ 2025-12-23 14:53:38 UTC Pre-commit check linux-x86_64-relwithdebinfo for 5333fed has started.
⚪ 2025-12-23 14:53:55 UTC Artifacts will be uploaded here
⚪ 2025-12-23 14:56:05 UTC ya make is running...
🟢 2025-12-23 15:03:54 UTC Tests successful.

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
276	276	0	0	0	0

🟢 2025-12-23 15:04:02 UTC Build successful.

[ydbot]

Backport

To backport this PR, click the button next to the target branch and then click "Run workflow" in the Run Actions UI.

Branch	Run
stable-25-2, stable-25-2-1, stable-25-3, stable-25-3-1
stable-25-3, stable-25-3-1
stable-25-3