Fix ydb-cli vulnerabilities found by Coverity (#15111)

[Alek5andr-Kotov]

Changelog entry

Moved changes from PR #15111.

Added checks to calm down the analyzer.

Changelog category

• Not for changelog (changelog entry is not required)

Description for reviewers

...

[github-actions]

⚪ 2025-02-27 12:20:21 UTC Pre-commit check linux-x86_64-relwithdebinfo for 2118519 has started.
⚪ 2025-02-27 12:20:39 UTC Artifacts will be uploaded here
⚪ 2025-02-27 12:23:06 UTC ya make is running...
🟢 2025-02-27 12:52:04 UTC Tests successful.

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
1046	1034	0	0	3	9

🟢 2025-02-27 12:52:17 UTC Build successful.
🟢 2025-02-27 12:52:27 UTC ydbd size 2.1 GiB changed* by 0 Bytes, which is <= 0 Bytes vs stable-25-1: OK

ydbd size dash	stable-25-1: 7432fca	merge: 2118519	diff	diff %
ydbd size	2 241 509 624 Bytes	2 241 509 624 Bytes	0 Bytes	0.000%
ydbd stripped size	474 784 248 Bytes	474 784 248 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]

⚪ 2025-02-27 12:20:27 UTC Pre-commit check linux-x86_64-release-asan for 2118519 has started.
⚪ 2025-02-27 12:20:42 UTC Artifacts will be uploaded here
⚪ 2025-02-27 12:23:09 UTC ya make is running...
🟡 2025-02-27 12:50:37 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?
630	618	0	1	1	10

⚪ 2025-02-27 12:50:47 UTC ya make is running... (failed tests rerun, try 2)
🟢 2025-02-27 13:10:25 UTC Tests successful.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
16 (only retried tests)	6	0	0	1	9

🟢 2025-02-27 13:10:32 UTC Build successful.
🟢 2025-02-27 13:10:47 UTC ydbd size 3.6 GiB changed* by -96 Bytes, which is <= 0 Bytes vs stable-25-1: OK

ydbd size dash	stable-25-1: 7432fca	merge: 2118519	diff	diff %
ydbd size	3 899 169 040 Bytes	3 899 168 944 Bytes	-96 Bytes	-0.000%
ydbd stripped size	1 364 771 312 Bytes	1 364 771 248 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}