Avoid unnecessary work during background cleanup of data parts

[CurtizJ]

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• Not for changelog (changelog entry is not required)

[clickhouse-gh]

Workflow [PR], commit [c9ec0c4]

Summary: ❌

job_name	test_name	status	info	comment
Docker server image		failure
	docker library image test	failure	cidb
Stress test (arm_asan, s3)		failure
	Server died	FAIL	cidb
	Hung check failed, possible deadlock found (see hung_check.log)	FAIL	cidb
	Killed by signal (in clickhouse-server.log)	FAIL	cidb
	Fatal message in clickhouse-server.log (see fatal_messages.txt)	FAIL	cidb
	Killed by signal (output files)	FAIL	cidb