feat: [PLG-3110] Updating scope for Cluster and Environment linking (#60

)

* feat: [PLG-3110] Adding support for linking a clusterId with an environmentId

Command looks like:
`./harness gitops-cluster link --cluster-id gitopscluster --environment-id harnessdevenv --project-id cmdProject --agent-identifier gitopsagentdec20`
Usage:
`./harness gitops-cluster link help`
NAME:
   harness gitops-cluster link - Links a GitOps-cluster with an environment.

USAGE:
   harness gitops-cluster link [command options] [arguments...]

OPTIONS:
   --agent-identifier value  provide GitOps Agent Identifier.
   --cluster-id value        provide a Cluster Identifier.
   --environment-id value    provide an Environment Identifier.
   --org-id value            provide an Organization Identifier.
   --project-id value        provide a Project Identifier.
   --help, -h                show help

* feat: [PLG-3110] Updating scope for Cluster and Environment linking

gitops-cluster.go

@@ -124,7 +124,7 @@ func createClusterEnvPayload(clusterId string, orgId string,
 		OrgIdentifier:     orgId,
 		ProjectIdentifier: projId,
 		EnvRef:            envId,
-		Scope:             "ACCOUNT",
+		Scope:             "PROJECT",
 	}
 }