Change MAX_BLOCK_SIZE constant for encrypted file deserializer to suit real export settings

[UgnineSirdis]

Changelog entry

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Changelog category

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Description for reviewers

Real settings for block size are 32 MB, so we need to make the constant bigger in order not to generate invalid encrypted files

[github-actions]

🟢 2025-06-19 21:46:58 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-06-19 21:49:33 UTC Pre-commit check linux-x86_64-release-asan for 9c98803 has started.
⚪ 2025-06-19 21:49:44 UTC Artifacts will be uploaded here
⚪ 2025-06-19 21:53:08 UTC ya make is running...
🟡 2025-06-19 23:38:39 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet Going to retry failed tests...

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
13909	13434	0	234	212	29

⚪ 2025-06-19 23:39:53 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-06-20 00:22:21 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet Going to retry failed tests...

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
2483 (only retried tests)	2151	0	113	189	30

⚪ 2025-06-20 00:22:43 UTC ya make is running... (failed tests rerun, try 3)
🟡 2025-06-20 00:57:25 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
1689 (only retried tests)	1431	0	56	179	23

🟢 2025-06-20 00:57:42 UTC Build successful.
🟢 2025-06-20 00:58:18 UTC ydbd size 3.9 GiB changed* by -96 Bytes, which is <= 0 Bytes vs main: OK

ydbd size dash	main: 6065f1e	merge: 9c98803	diff	diff %
ydbd size	4 180 038 752 Bytes	4 180 038 656 Bytes	-96 Bytes	-0.000%
ydbd stripped size	1 449 114 744 Bytes	1 449 114 680 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]

⚪ 2025-06-19 21:49:34 UTC Pre-commit check linux-x86_64-relwithdebinfo for 9c98803 has started.
⚪ 2025-06-19 21:49:45 UTC Artifacts will be uploaded here
⚪ 2025-06-19 21:53:10 UTC ya make is running...
🟡 2025-06-19 22:57:01 UTC Some tests failed, follow the links below. Going to retry failed tests...

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
29149	27743	0	12	1346	48

⚪ 2025-06-19 22:59:35 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-06-19 23:11:04 UTC Some tests failed, follow the links below. Going to retry failed tests...

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
493 (only retried tests)	461	0	2	0	30

⚪ 2025-06-19 23:11:13 UTC ya make is running... (failed tests rerun, try 3)
🔴 2025-06-19 23:20:51 UTC Some tests failed, follow the links below.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
326 (only retried tests)	296	0	1	0	29

🟢 2025-06-19 23:20:58 UTC Build successful.
🟢 2025-06-19 23:21:23 UTC ydbd size 2.2 GiB changed* by 0 Bytes, which is <= 0 Bytes vs main: OK

ydbd size dash	main: 6065f1e	merge: 9c98803	diff	diff %
ydbd size	2 376 303 640 Bytes	2 376 303 640 Bytes	0 Bytes	0.000%
ydbd stripped size	497 974 856 Bytes	497 974 856 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}