feat: Add new gcloud commands, API clients, and third-party libraries across various services.

gcloud auth application-default login/google-cloud-sdk/lib/surface/dns/policies/delete.yaml

@@ -0,0 +1,30 @@
+- &GA
+  release_tracks: [GA]
+  help_text:
+    brief: Deletes a Cloud DNS policy.
+    description: |
+      Deletes a Cloud DNS policy.
+      ## EXAMPLES
+
+      To delete a policy, run:
+
+        $ {command} mypolicy
+
+  request:
+    collection: dns.policies
+    method: delete
+    api_version: v1
+
+  arguments:
+    resource:
+      help_text: The name of the policy you want to delete.
+      is_positional: true
+      spec: !REF googlecloudsdk.command_lib.dns.resources:policy
+
+- <<: *GA
+  release_tracks: [BETA, ALPHA]
+
+  request:
+    collection: dns.policies
+    method: delete
+    api_version: v1beta2