Add compatibility test for InferPDiskSlotCount feature

[rosik]

Changelog category

• Not for changelog (changelog entry is not required)

Description for reviewers

• Part of EPIC: Optimize the use of disks of different sizes (SSD 1.6 / 3.2 / 6.4) #16959
• Besides compatibility the test covers Change expected slot count without pdisk restart #25676

[github-actions]

🟢 2025-10-21 17:53:48 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-10-21 17:55:48 UTC Pre-commit check linux-x86_64-release-asan for f40413a has started.
⚪ 2025-10-21 17:56:02 UTC Artifacts will be uploaded here
⚪ 2025-10-21 17:58:45 UTC ya make is running...
🟢 2025-10-21 18:00:15 UTC Tests successful.

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
36	36	0	0	0	0

🟢 2025-10-21 18:00:18 UTC Build successful.
🟢 2025-10-21 18:00:33 UTC ydbd size 3.8 GiB changed* by +1.0 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: c21557e	merge: f40413a	diff	diff %
ydbd size	4 040 423 040 Bytes	4 040 424 080 Bytes	+1.0 KiB	+0.000%
ydbd stripped size	1 501 086 880 Bytes	1 501 087 520 Bytes	+640 Bytes	+0.000%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}

[github-actions]

⚪ 2025-10-21 18:05:29 UTC Pre-commit check linux-x86_64-relwithdebinfo for f40413a has started.
⚪ 2025-10-21 18:05:46 UTC Artifacts will be uploaded here
⚪ 2025-10-21 18:08:30 UTC ya make is running...
🟢 2025-10-21 18:10:04 UTC Tests successful.

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
48	48	0	0	0	0

🟢 2025-10-21 18:10:07 UTC Build successful.
🟢 2025-10-21 18:10:18 UTC ydbd size 2.3 GiB changed* by +464 Bytes, which is < 100.0 KiB vs main: OK

ydbd size dash	main: c21557e	merge: f40413a	diff	diff %
ydbd size	2 428 280 496 Bytes	2 428 280 960 Bytes	+464 Bytes	+0.000%
ydbd stripped size	516 640 328 Bytes	516 640 520 Bytes	+192 Bytes	+0.000%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}