Prevent conn leak on thread interrupt #3189

Job	Run time
check-s3-related-changes	1m 1s
s3-regression-tests-download	29m 29s
s3-regression-tests-upload-async	23m 57s
s3-regression-tests-upload-sync	8m 53s
s3-regression-tests-upload-crt	11m 24s
s3-regression-tests-control-plane	6m 22s
s3-regression-tests-upload-multi	6m 51s
	1h 27m 57s

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