schemeshard: fix error handling of bad format in default_access

[ijon]

Avoid unhandled exception in case when security_config.default_access contains entry with bad permission format.

Changelog category

• Not for changelog

[github-actions]

⚪ 2025-01-23 19:42:38 UTC Pre-commit check linux-x86_64-release-asan for 3581a82 has started.
⚪ 2025-01-23 19:42:49 UTC Artifacts will be uploaded here
⚪ 2025-01-23 19:45:42 UTC ya make is running...
🟡 2025-01-23 21:00:00 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?
11284	11227	0	15	10	32

⚪ 2025-01-23 21:01:13 UTC ya make is running... (failed tests rerun, try 2)
🟢 2025-01-23 21:12:59 UTC Tests successful.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
90 (only retried tests)	56	0	0	8	26

🟢 2025-01-23 21:13:06 UTC Build successful.
🟢 2025-01-23 21:13:31 UTC ydbd size 3.6 GiB changed* by +8.9 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: 432c205	merge: 3581a82	diff	diff %
ydbd size	3 858 896 264 Bytes	3 858 905 360 Bytes	+8.9 KiB	+0.000%
ydbd stripped size	1 349 672 144 Bytes	1 349 677 552 Bytes	+5.3 KiB	+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]

⚪ 2025-01-23 19:44:19 UTC Pre-commit check linux-x86_64-relwithdebinfo for 3581a82 has started.
⚪ 2025-01-23 19:44:31 UTC Artifacts will be uploaded here
⚪ 2025-01-23 19:47:23 UTC ya make is running...
🟡 2025-01-23 20:31:47 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?
18736	17434	0	1	1180	121

⚪ 2025-01-23 20:33:30 UTC ya make is running... (failed tests rerun, try 2)
🟢 2025-01-23 20:42:49 UTC Tests successful.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
178 (only retried tests)	60	0	0	0	118

🟢 2025-01-23 20:42:56 UTC Build successful.
🟢 2025-01-23 20:43:15 UTC ydbd size 2.1 GiB changed* by +2.9 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: 432c205	merge: 3581a82	diff	diff %
ydbd size	2 220 827 248 Bytes	2 220 830 224 Bytes	+2.9 KiB	+0.000%
ydbd stripped size	469 707 792 Bytes	469 708 240 Bytes	+448 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}