Fixed antlr4 build warnings

[OrlovPavel]

Changelog entry

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Changelog category

• New feature
• Experimental feature
• Improvement
• Performance improvement
• Bugfix
• Backward incompatible change
• Documentation (changelog entry is not required)
• Not for changelog (changelog entry is not required)

Additional information

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[github-actions]

Hi! Thank you for contributing!
The tests on this PR will run after a maintainer adds an ok-to-test label to this PR manually. Thank you for your patience!

[github-actions]

⚪ 2024-09-08 23:03:05 UTC Pre-commit check linux-x86_64-release-clang14 for d7849ce has started.
⚪ 2024-09-08 23:05:57 UTC ya make is running...
🟢 2024-09-08 23:12:59 UTC Build successful.

[github-actions]

⚪ 2024-09-08 23:03:07 UTC Pre-commit check linux-x86_64-release-asan for d7849ce has started.
⚪ 2024-09-08 23:05:58 UTC ya make is running...
🔴 2024-09-09 00:40:55 UTC Some tests failed, follow the links below.

Test history | Ya make output

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
12829	12752	0	16	34	27

🟢 2024-09-09 00:41:59 UTC Build successful.
🟢 2024-09-09 00:42:32 UTC ydbd size 5.6 GiB changed* by -96 Bytes, which is <= 0 Bytes vs main: OK

ydbd size dash	main: c0d60de	merge: d7849ce	diff	diff %
ydbd size	6 030 841 256 Bytes	6 030 841 160 Bytes	-96 Bytes	-0.000%
ydbd stripped size	1 510 004 848 Bytes	1 510 004 784 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]

⚪ 2024-09-08 23:05:18 UTC Pre-commit check linux-x86_64-relwithdebinfo for d7849ce has started.
⚪ 2024-09-08 23:08:10 UTC ya make is running...
🟡 2024-09-09 00:21:24 UTC Some tests failed, follow the links below. Going to retry failed tests...

Test history | Ya make output

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
75068	61236	0	28	13778	26

⚪ 2024-09-09 00:28:35 UTC ya make is running... (failed tests rerun, try 2)
🟢 2024-09-09 00:37:30 UTC Tests successful.

Test history | Ya make output

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
75 (only retried tests)	55	0	0	0	20

🟢 2024-09-09 00:37:38 UTC Build successful.
🟢 2024-09-09 00:38:19 UTC ydbd size 8.4 GiB changed* by -32 Bytes, which is <= 0 Bytes vs main: OK

ydbd size dash	main: c0d60de	merge: d7849ce	diff	diff %
ydbd size	9 015 196 936 Bytes	9 015 196 904 Bytes	-32 Bytes	-0.000%
ydbd stripped size	487 384 904 Bytes	487 384 904 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}