[Backport stable-25-3] Use default value of BufferPageAllocSize from proto

[ydbot]

Description

Backport of #28237 to stable-25-3.

[github-actions]

⚪ 2025-11-06 15:36:53 UTC Pre-commit check linux-x86_64-release-asan for 5fb6524 has started.
⚪ 2025-11-06 15:37:09 UTC Artifacts will be uploaded here
⚪ 2025-11-06 15:40:37 UTC ya make is running...
🟡 2025-11-06 17:43:20 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
15386	14704	0	347	319	16

🟢 2025-11-06 17:44:44 UTC Build successful.
🟢 2025-11-06 17:45:08 UTC ydbd size 3.8 GiB changed* by -128 Bytes, which is <= 0 Bytes vs stable-25-3: OK

ydbd size dash	stable-25-3: 178ec40	merge: 5fb6524	diff	diff %
ydbd size	4 060 134 944 Bytes	4 060 134 816 Bytes	-128 Bytes	-0.000%
ydbd stripped size	1 513 158 048 Bytes	1 513 158 112 Bytes	+64 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]

⚪ 2025-11-06 15:39:18 UTC Pre-commit check linux-x86_64-relwithdebinfo for 5fb6524 has started.
⚪ 2025-11-06 15:39:33 UTC Artifacts will be uploaded here
⚪ 2025-11-06 15:43:06 UTC ya make is running...
🟡 2025-11-06 17:10:21 UTC Some tests failed, follow the links below. Going to retry failed tests...

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
30693	29372	0	6	1292	23

⚪ 2025-11-06 17:13:10 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-11-06 17:32:21 UTC Some tests failed, follow the links below. Going to retry failed tests...

Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
593 (only retried tests)	574	0	1	0	18

⚪ 2025-11-06 17:32:32 UTC ya make is running... (failed tests rerun, try 3)
🟢 2025-11-06 17:49:23 UTC Tests successful.

Ya make output | Test bloat | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
531 (only retried tests)	512	0	0	0	19

🟢 2025-11-06 17:49:32 UTC Build successful.
🟢 2025-11-06 17:49:50 UTC ydbd size 2.3 GiB changed* by -224 Bytes, which is <= 0 Bytes vs stable-25-3: OK

ydbd size dash	stable-25-3: 178ec40	merge: 5fb6524	diff	diff %
ydbd size	2 439 362 232 Bytes	2 439 362 008 Bytes	-224 Bytes	-0.000%
ydbd stripped size	522 244 072 Bytes	522 244 072 Bytes	0 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]

🟢 2025-11-06 15:39:30 UTC The validation of the Pull Request description is successful.