[bootstrap] fix: remove conflicting condition for immutable flag and state:absent (#1064)

bootstrap/templates/ansible/playbooks/cluster-prepare.yaml.j2

@@ -9,7 +9,7 @@
       ansible.builtin.pause:
         seconds: 5
     - name: Populate service facts
-      service_facts:
+      ansible.builtin.service_facts:
   tasks:
     - name: Locale
       block:
@@ -73,6 +73,10 @@
             regexp: ManageForeignRoutes
             line: ManageForeignRoutes=no
         # https://github.com/onedr0p/flux-cluster-template/discussions/635
+        - name: Network Configuration | Remove immutable flag from /etc/resolv.conf
+          ansible.builtin.file:
+            attributes: -i
+            path: /etc/resolv.conf
         - name: Network Configuration | Remove /etc/resolv.conf
           ansible.builtin.file:
             attributes: -i
@@ -81,7 +85,7 @@
         - name: Network Configuration | Add custom /etc/resolv.conf
           ansible.builtin.copy:
             attributes: +i
-            mode: 644
+            mode: '0644'
             dest: /etc/resolv.conf
             content: |
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