fix: prevent possible connection leak in AutorecoveringConnection during creation #2407

Job	Run time
call-build-test / build-ubuntu	1m 5s
call-build-test / build-win32	3m 18s
call-build-test / integration-ubuntu	4m 8s
call-build-test / sequential-integration-ubuntu	10m 7s
call-build-test / integration-win32	10m 10s
call-build-test / sequential-integration-win32	21m 8s
	49m 56s

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