ci: temporarily disable single-arch CI

Disable push/pull_request triggers on therock-ci.yml while testing the
multi-arch CI pipeline (therock-multi-arch-ci.yml). Keep workflow_dispatch
so it can still be triggered manually if needed.

Co-Authored-By: Claude Sonnet 4 <noreply@anthropic.com>

Author: lumachad

.github/workflows/therock-ci.yml

@@ -1,14 +1,8 @@
 name: TheRock CI for rocgdb
 
+# Temporarily disabled: using multi-arch CI only (therock-multi-arch-ci.yml).
+# Re-enable by restoring push/pull_request triggers.
 on:
-  push:
-    branches:
-      - amd-staging
-      - amd-staging-rocgdb-*
-  pull_request:
-    branches:
-      - amd-staging
-      - amd-staging-rocgdb-*
   workflow_dispatch:
 
 permissions: