Fix flaky TServiceDestroyTest.ShouldDestroyNonreplDiskWhenGracefulShutdownFailedToFindTheVolume

[SvartMetal]

Notes

Describe your PR - what it does and why this needs to be done.

Issue

Test was added in #5511

[github-actions]

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🟢 linux-x86_64-relwithdebinfo target: cloud/tasks/,cloud/storage/ (test time: 250s): all tests PASSED for commit c0c1e2c.

TESTS	PASSED	ERRORS	FAILED	FAILED BUILD	SKIPPED	MUTED?
865	865	0	0	0	0	0

🔴 linux-x86_64-relwithdebinfo target: cloud/blockstore/ (test time: 1501s): some tests FAILED for commit c0c1e2c.

TESTS	PASSED	ERRORS	FAILED	FAILED BUILD	SKIPPED	MUTED?
5970	5968	0	1	0	1	0

🟢 linux-x86_64-relwithdebinfo target: cloud/blockstore/ (test time: 44s): all tests PASSED for commit c0c1e2c.

TESTS	PASSED	ERRORS	FAILED	FAILED BUILD	SKIPPED	MUTED?
2	2	0	0	0	0	0

🟢 linux-x86_64-relwithdebinfo target: cloud/filestore/ (test time: 4728s): all tests PASSED for commit c0c1e2c.

TESTS	PASSED	ERRORS	FAILED	FAILED BUILD	SKIPPED	MUTED?
3516	3516	0	0	0	0	0