feat(events): Add gcpPublishEvent Groovy file (#4927)

* add gcpPublishEvent.groovy

* fix unit tests

---------

Co-authored-by: jliempt <>

Author: jliempt

test/groovy/CommonStepsTest.groovy

@@ -233,6 +233,7 @@ public class CommonStepsTest extends BasePiperTest{
         'tmsUpload',
         'tmsExport',
         'imagePushToRegistry',
+        'gcpPublishEvent'
     ]
 
     @Test

vars/gcpPublishEvent.groovy

@@ -0,0 +1,9 @@
+import groovy.transform.Field
+
+@Field String STEP_NAME = getClass().getName()
+@Field String METADATA_FILE = 'metadata/gcpPublishEvent.yaml'
+
+void call(Map parameters = [:]) {
+    List credentials = []
+    piperExecuteBin(parameters, STEP_NAME, METADATA_FILE, credentials)
+}