deployer: add deployer:skip-deploy-hubs to allow support only deploy

deployer/commands/generate/helm_upgrade/decision.py

@@ -103,6 +103,8 @@ def generate_hub_matrix_jobs(
     """
     if pr_labels and "deployer:skip-deploy" in pr_labels:
         return []
+    if pr_labels and "deployer:skip-deploy-hubs" in pr_labels:
+        return []
 
     # Empty list to store all the matrix job definitions in
     matrix_jobs = []

deployer/commands/generate/helm_upgrade/jobs.py

@@ -29,7 +29,7 @@ def helm_upgrade_jobs(
     ),
     pr_labels: str = typer.Argument(
         "[]",
-        help="JSON formatted list of PR labels, where 'deployer:skip-deploy' is respected.",
+        help="JSON formatted list of PR labels, where 'deployer:skip-deploy' and 'deployer:skip-deploy-hubs' are respected.",
     ),
 ):
     """