add capability to disable systemd-resolved to base_config role

roles/deploy_systemd_resolved_config/meta/argument_specs.yaml

@@ -0,0 +1,21 @@
+---
+argument_specs:
+  main:
+    options:
+      deploy_systemd_resolved_config__enable:
+        description: "Whether systemd-resolved should be enabled or disabled"
+        type: bool
+        required: false
+      deploy_systemd_resolved_config__mode:
+        description: "Which /etc/resolv.conf compatibility mode should be configured"
+        type: str
+        required: false
+        choices: [ "stub", "static-stub", "passthru", "extern" ]
+      deploy_systemd_resolved_config__dns:
+        description: "A list of DNS servers that will be configured as default dns servers"
+        type: list
+        required: false
+      deploy_systemd_resolved_config__fallback_dns:
+        description: "A list of fallback DNS servers that will be configured"
+        type: list
+        required: false