Fix memory leak in case of launch periodic keep-alive task for query service session

[dcherednik]

No description provided.

[github-actions]

⚪ 2024-11-11 18:08:50 UTC Pre-commit check linux-x86_64-release-asan for 0c37471 has started.
⚪ 2024-11-11 18:09:29 UTC Artifacts will be uploaded here
⚪ 2024-11-11 18:13:10 UTC ya make is running...
🟡 2024-11-11 19:16:38 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
9204	9121	0	34	7	42

🟢 2024-11-11 19:17:28 UTC Build successful.
🟢 2024-11-11 19:18:00 UTC ydbd size 5.7 GiB changed* by -3.2 KiB, which is <= 0 Bytes vs main: OK

ydbd size dash	main: 57ae3a3	merge: 0c37471	diff	diff %
ydbd size	6 166 615 656 Bytes	6 166 612 400 Bytes	-3.2 KiB	-0.000%
ydbd stripped size	1 537 670 416 Bytes	1 537 670 608 Bytes	+192 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]

⚪ 2024-11-11 18:08:56 UTC Pre-commit check linux-x86_64-relwithdebinfo for 0c37471 has started.
⚪ 2024-11-11 18:09:07 UTC Artifacts will be uploaded here
⚪ 2024-11-11 18:12:14 UTC ya make is running...
🟡 2024-11-11 19:09:47 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?
40550	34869	0	13	5559	109

⚪ 2024-11-11 19:13:13 UTC ya make is running... (failed tests rerun, try 2)
🟢 2024-11-11 19:24:25 UTC Tests successful.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
116 (only retried tests)	14	0	0	0	102

🟢 2024-11-11 19:24:32 UTC Build successful.
🟢 2024-11-11 19:24:51 UTC ydbd size 2.8 GiB changed* by -5.0 KiB, which is <= 0 Bytes vs main: OK

ydbd size dash	main: 57ae3a3	merge: 0c37471	diff	diff %
ydbd size	3 047 283 720 Bytes	3 047 278 576 Bytes	-5.0 KiB	-0.000%
ydbd stripped size	482 271 864 Bytes	482 271 736 Bytes	-128 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}

[dcherednik]

#11478