cloud: close Reader before resetting in ResumingReader #75149
Merged
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This change
Close()
s the Reader before resetting it when weencounter a resumable error in the ResumingReader. This is particularly
important for the http external storage provide, since forgetting to
call Close() results in goroutine leaks from go1.17.6 onwards.
See: golang/go#50652
Fixes: #75143
Release note: None