[kustomize_deploy] Update kustomize repo version to use pinned version from group_vars

Now we can get the version from group_vars pinned section.
We can still override this by passing extra vars or directly defined it from
CI jobs.

Signed-off-by: Enrique Vallespi Gil <evallesp@redhat.com>

Author: evallesp

roles/kustomize_deploy/README.md

@@ -21,7 +21,8 @@ with a message.
   where the architecture repo is cloned on the controller node.
   Defaults to `~/src/github.com/openstack-k8s-operators/architecture`
 - `cifmw_kustomize_deploy_architecture_repo_version`: _(string)_ Default branch
-  of the architecture repo to clone.Defaults to `HEAD`
+  of the architecture repo to clone. Takes its value from group_vars
+  cifmw_architecture_repo_version_pin, defaults to `HEAD` if not defined.
 - `cifmw_kustomize_deploy_architecture_examples_common_path`: _(string)_
   Relative path of the common CRs in the architecture repo. Defaults to
   `/examples/common`

roles/kustomize_deploy/defaults/main.yml

@@ -35,7 +35,7 @@ cifmw_kustomize_deploy_architecture_repo_dest_dir: >-
       ] | path_join )
   }}
 
-cifmw_kustomize_deploy_architecture_repo_version: "HEAD"
+cifmw_kustomize_deploy_architecture_repo_version: "{{ cifmw_architecture_repo_version_pin | default('HEAD') }}"
 
 cifmw_kustomize_deploy_architecture_examples_common_path: "examples/common/"
 cifmw_kustomize_deploy_architecture_examples_path: "examples/va/"