Add analysis info for GCP creds (#3727)

* Add user info for gcp credential

* Use principal and include Type

Author: bill-rich

pkg/detectors/gcp/gcp.go

@@ -113,6 +113,13 @@ func (s Scanner) FromData(ctx context.Context, verify bool, data []byte) (result
 				"rotation_guide": "https://howtorotate.com/docs/tutorials/gcp/",
 				"project":        creds.ProjectID,
 			},
+			AnalysisInfo: map[string]string{
+				"principal": creds.ClientEmail,
+			},
+		}
+
+		if creds.Type != "" {
+			result.AnalysisInfo["type"] = creds.Type
 		}
 
 		if verify {