[Vendor] Update xanzy/go-gitlab v0.31.0 => v0.37.0 (#12701)

* update github.com/xanzy/go-gitlab v0.31.0 => v0.37.0

* vendor

* adapt changes

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

vendor/github.com/hashicorp/go-retryablehttp/roundtripper.go

@@ -1,7 +1,9 @@
 package retryablehttp
 
 import (
+	"errors"
 	"net/http"
+	"net/url"
 	"sync"
 )
 
@@ -39,5 +41,12 @@ func (rt *RoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
 	}
 
 	// Execute the request.
-	return rt.Client.Do(retryableReq)
+	resp, err := rt.Client.Do(retryableReq)
+	// If we got an error returned by standard library's `Do` method, unwrap it
+	// otherwise we will wind up erroneously re-nesting the error.
+	if _, ok := err.(*url.Error); ok {
+		return resp, errors.Unwrap(err)
+	}
+
+	return resp, err
 }