feat(mavenBuild): add the possibility to define stash groups need to be stashed/unstashed (#4573)

* Add stash param to mavenBuild

* go generate

* Delete default stash group

---------

Co-authored-by: Anil Keshav <anil.keshav@sap.com>

cmd/mavenBuild_generated.go

@@ -283,6 +283,9 @@ func mavenBuildMetadata() config.StepData {
 				Secrets: []config.StepSecrets{
 					{Name: "altDeploymentRepositoryPasswordId", Description: "Jenkins credentials ID containing the artifact deployment repository password.", Type: "jenkins"},
 				},
+				Resources: []config.StepResources{
+					{Type: "stash"},
+				},
 				Parameters: []config.StepParameters{
 					{
 						Name:        "pomPath",

resources/metadata/mavenBuild.yaml

@@ -231,6 +231,8 @@ spec:
         resourceRef:
           - name: commonPipelineEnvironment
             param: custom/buildSettingsInfo
+    resources:
+      - type: stash
   outputs:
     resources:
       - name: commonPipelineEnvironment