salt: Add check pillar in etcd orchestrate

During etcd orchestrate etcd to deploy etcd we need to have information
about repository endpoint, so check this pillar value before running the
salt state on the minion

salt/metalk8s/orchestrate/etcd.sls

@@ -14,14 +14,31 @@ Sync {{ node }} minion:
     - kwarg:
         saltenv: metalk8s-{{ dest_version }}
 
+Check pillar on {{ node }}:
+  salt.function:
+    - name: metalk8s.check_pillar_keys
+    - tgt: {{ node }}
+    - kwarg:
+        keys:
+          - metalk8s.endpoints.repositories.ip
+          - metalk8s.endpoints.repositories.ports.http
+        # We cannot raise when using `salt.function` as we need to return
+        # `False` to have a failed state
+        # https://github.com/saltstack/salt/issues/55503
+        raise_error: False
+    - retry:
+        attempts: 5
+    - require:
+      - salt: Sync {{ node }} minion
+
 Deploy etcd {{ node }} to {{ dest_version }}:
   salt.state:
     - tgt: {{ node }}
     - sls:
       - metalk8s.kubernetes.etcd
     - saltenv: metalk8s-{{ dest_version }}
     - require:
-      - salt: Sync {{ node }} minion
+      - salt: Check pillar on {{ node }}
       - module: Check etcd cluster health
   {%- if previous_node is defined %}
       - metalk8s: Check etcd cluster health for {{ previous_node }}