fix: prevent internal request retry to s3proxy backend

The http body stream is not a seekable stream, so most operation
retry attempts will fail with an internal server error. This
change tells the s3 client within the gateway to not retry any
requests, and instead let the client of the gateway handle the
error retry.

Fixes #1353

backend/s3proxy/client.go

@@ -37,6 +37,10 @@ func (s *S3Proxy) getClientWithCtx(ctx context.Context) (*s3.Client, error) {
 		return s3.NewFromConfig(cfg, func(o *s3.Options) {
 			o.BaseEndpoint = &s.endpoint
 			o.UsePathStyle = s.usePathStyle
+			// The http body stream is not seekable, so most operations cannot
+			// be retried. The error returned to the original client may be
+			// retried by the client.
+			o.Retryer = aws.NopRetryer{}
 		}), nil
 	}