stop saving alchemy url (#1614)

Verification of an Alchemy secret requires putting the candidate secret directly into a URL. This makes the URL potentially sensitive, and if the request fails, we don't want to save it anywhere that might inadvertently get logged elsewhere - like the resulting error message. (Despite verification failing, this error message is only saved if the failure is indeterminate, which means that the secret might actually be live.)

pkg/detectors/alchemy/alchemy.go

@@ -65,7 +65,7 @@ func (s Scanner) FromData(ctx context.Context, verify bool, data []byte) (result
 				} else if res.StatusCode == 401 {
 					// The secret is determinately not verified (nothing to do)
 				} else {
-					s1.VerificationError = fmt.Errorf("request to %v returned unexpected status %d", res.Request.URL, res.StatusCode)
+					s1.VerificationError = fmt.Errorf("unexpected HTTP response status %d", res.StatusCode)
 				}
 			} else {
 				s1.VerificationError = err