ci: exclude symbol golden files from build-and-ci pullapprove group (angular#27004)

these files are test data and note test infrastructure, so they don't belong to this group.

this means that the core group can now approve the golden symbol changes

PR Close angular#27004

Author: IgorMinar

.pullapprove.yml

@@ -108,8 +108,9 @@ groups:
           - "*.lock"
           - "tools/*"
         exclude:
-          - "tools/public_api_guard/*"
           - "aio/*"
+          - "packages/core/test/bundling/*"
+          - "tools/public_api_guard/*"
     users:
       - IgorMinar #primary
       - alexeagle