fix unregister group race (#10020)

[fexolm]

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]

⚪ 2024-10-03 12:00:57 UTC Pre-commit check for cce7d56 has started.
⚪ 2024-10-03 12:03:32 UTC Build linux-x86_64-release-clang14 is running...
🟢 2024-10-03 12:10:15 UTC Build successful.

[github-actions]

⚪ 2024-10-03 12:01:07 UTC Pre-commit check for cce7d56 has started.
⚪ 2024-10-03 12:03:39 UTC Build linux-x86_64-release-asan is running...
🟢 2024-10-03 12:26:58 UTC Build successful.
⚪ 2024-10-03 12:27:13 UTC Tests are running...
🔴 2024-10-03 14:23:03 UTC Some tests failed, follow the links below.

Test history | Test log

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
11218	11137	0	9	28	44

🟢 2024-10-03 14:24:00 UTC ydbd size 5.5 GiB changed* by +9.3 KiB, which is < 100.0 KiB vs stable-24-3-9-cs: OK

ydbd size dash	stable-24-3-9-cs: 602dfb0	merge: cce7d56	diff	diff %
ydbd size	5 957 720 104 Bytes	5 957 729 640 Bytes	+9.3 KiB	+0.000%
ydbd stripped size	1 491 572 320 Bytes	1 491 574 240 Bytes	+1.9 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]

⚪ 2024-10-03 12:01:07 UTC Pre-commit check for cce7d56 has started.
⚪ 2024-10-03 12:03:43 UTC Build linux-x86_64-relwithdebinfo is running...
🟢 2024-10-03 12:44:22 UTC Build successful.
⚪ 2024-10-03 12:44:36 UTC Tests are running...
🔴 2024-10-03 14:09:51 UTC Some tests failed, follow the links below.

Test history | Test log

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
15528	14181	0	4	1300	43

🟢 2024-10-03 14:10:34 UTC ydbd size 8.2 GiB changed* by +9.2 KiB, which is < 100.0 KiB vs stable-24-3-9-cs: OK

ydbd size dash	stable-24-3-9-cs: 602dfb0	merge: cce7d56	diff	diff %
ydbd size	8 796 849 064 Bytes	8 796 858 440 Bytes	+9.2 KiB	+0.000%
ydbd stripped size	479 906 696 Bytes	479 907 208 Bytes	+512 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}