Remove StackAction from Octavia deployment

Since ephemeral Heat, StackAction is now always
CREATE. Subsequentaly, it no longer serves the
intended purpose for the Octavia deployment.

This change removes StackAction from the template.

Partial-Bug: #1936138
Depends-on: https://review.opendev.org/c/openstack/tripleo-ansible/+/847817
Change-Id: Ia3f4de0028a4c264a9f2d1277878221969e180d5
(cherry picked from commit 5771d93182)

deployment/octavia/octavia-deployment-config.j2.yaml

@@ -27,13 +27,6 @@ parameters:
     description: Mapping of service endpoint -> protocol. Typically set
                  via parameter_defaults in the resource registry.
     type: json
-  StackAction:
-    type: string
-    description: >
-      Heat action on performed top-level stack.  Note StackUpdateType is
-      set to UPGRADE when a major-version upgrade is in progress.
-    constraints:
-    - allowed_values: ['CREATE', 'UPDATE']
   OctaviaPostWorkflowName:
     description: Mistral workflow name for octavia configuration steps
                  once the overcloud is ready.
@@ -260,7 +253,6 @@ resources:
           octavia_group_vars_dir: "{{playbook_dir}}/octavia-ansible/group_vars"
           container_cli: { get_param: ContainerCli }
           enable_log_offloading: { get_param: OctaviaLogOffload }
-          stack_action: { get_param: StackAction }
           octavia_flavor_id: { get_param: OctaviaFlavorId }
           octavia_flavor_properties: { get_param: OctaviaFlavorProperties }
           octavia_manage_nova_flavor: { get_param: OctaviaManageNovaFlavor }