ci: use Namespace runner for CLI tests

Switch from ubuntu-latest to namespace-profile-bolter-main,
matching the org's runner convention from slingshot/midnights.

Author: heysanil

.github/workflows/cli-tests.yml

@@ -15,7 +15,7 @@ on:
 jobs:
   test:
     name: Unit & Integration Tests
-    runs-on: ubuntu-latest
+    runs-on: namespace-profile-bolter-main
     steps:
       - uses: actions/checkout@v4