Refactor Ansible actions to improve host inventory handling

.github/actions/setup-ansible-env/action.yml

@@ -48,7 +48,7 @@ runs:
       env:
         HOST_GROUP: ${{ inputs.host-group }}
       run: |
-        ansible-inventory -i inventory/hosts --list --yaml $HOST_GROUP | grep -oP '(\w+\.){2}\w+' | sort -u > /tmp/ansible_hosts
+        ansible-inventory -i inventory/hosts --list --yaml $HOST_GROUP | grep -oP '([a-zA-Z0-9-]+\.)+[a-zA-Z]{2,}' | sort -u > /tmp/ansible_hosts
         echo "hosts=$(cat /tmp/ansible_hosts)" >> $GITHUB_OUTPUT
 
     - name: Read SSH host keys from remote hosts

.github/actions/setup-k8s-env/action.yml

@@ -37,7 +37,7 @@ runs:
         K8S_TARGET: ${{ inputs.k8s-target }}
       run: |
         # Get Hostname and IP address of the target
-        ANSIBLE_HOST=$(ansible -i inventory/hosts -u $ANSIBLE_USER -m shell -a "hostname" $K8S_TARGET | grep -oP '(\w+\.){2}\w+' | head -1)
+        ANSIBLE_HOST=$(ansible -i inventory/hosts -u $ANSIBLE_USER -m shell -a "hostname" $K8S_TARGET | grep -oP '([a-zA-Z0-9-]+\.)+[a-zA-Z]{2,}' | head -1)
         IP_ADDR=$(ansible -i inventory/hosts -u $ANSIBLE_USER -m shell -a "curl -s ifconfig.me" $K8S_TARGET | grep -oP '(\d+\.){3}\d+')
 
         # Forward the k8s API server port to localhost