Enable reserved variable name checks and fix violations (#12463)

* Enable reserved variable name checks and fix violations

Updated .ansible-lint configuration to skip only var-naming[pattern]
and var-naming[no-role-prefix] instead of skipping the entire var-naming rule.
This enables the check for reserved variable names.

Renamed variables that used reserved names to avoid conflicts.
Updated all references in tasks, variables, and templates.

Signed-off-by: Ali Afsharzadeh <afsharzadeh8@gmail.com>

* Rename namespace variable inside tasks instead of deleting it

Signed-off-by: Ali Afsharzadeh <afsharzadeh8@gmail.com>

* Change hosts variable to vm_hosts

Signed-off-by: Ali Afsharzadeh <afsharzadeh8@gmail.com>

* Use k8s_namespace instead of dashboard_namespace in dashboard.yml.j2 template

Signed-off-by: Ali Afsharzadeh <afsharzadeh8@gmail.com>

---------

Signed-off-by: Ali Afsharzadeh <afsharzadeh8@gmail.com>

roles/kubernetes-apps/ansible/templates/dashboard.yml.j2

@@ -17,14 +17,14 @@
 #
 # Example usage: kubectl create -f <this_file>
 
-{% if namespace != 'kube-system' %}
+{% if k8s_namespace != 'kube-system' %}
 ---
 apiVersion: v1
 kind: Namespace
 metadata:
-  name: {{ namespace }}
+  name: {{ k8s_namespace }}
   labels:
-    name: {{ namespace }}
+    name: {{ k8s_namespace }}
 {% endif %}
 ---
 # ------------------- Dashboard Secrets ------------------- #
@@ -118,7 +118,7 @@ roleRef:
 subjects:
   - kind: ServiceAccount
     name: kubernetes-dashboard
-    namespace: {{ namespace }}
+    namespace: {{ k8s_namespace }}
 
 ---
 apiVersion: rbac.authorization.k8s.io/v1
@@ -132,7 +132,7 @@ roleRef:
 subjects:
   - kind: ServiceAccount
     name: kubernetes-dashboard
-    namespace: {{ namespace }}
+    namespace: {{ k8s_namespace }}
 
 ---
 # ------------------- Dashboard Deployment ------------------- #
@@ -173,7 +173,7 @@ spec:
             - containerPort: 8443
               protocol: TCP
           args:
-            - --namespace={{ namespace }}
+            - --namespace={{ k8s_namespace }}
 {% if dashboard_use_custom_certs %}
             - --tls-key-file={{ dashboard_tls_key_file }}
             - --tls-cert-file={{ dashboard_tls_cert_file }}