Skip LA rules in upate-test-rules workflow (#824)

.github/workflows/update-test-rules.yml

@@ -122,6 +122,12 @@ jobs:
           # but it doesn't seem any simpler). And then add testing metadata.
           # If multiple PRs modify the same file, only one can be tested. This is solveable, but not something we see often.
           for file in $files_changed; do
+            # Skip any LA rules. We'll ignore these downstream anyway, but best to keep the branch clean.
+            la_count=$(grep -c 'beta.linkanalysis' detection-rules/$file || true)
+            if [[ "$la_count" != '0' ]]; then
+              continue
+            fi
+            
             cp source/$file destination/$file
             yq -i '.testing_pr = env(pr_num)' destination/$file
             yq -i '.testing_sha = env(sha)' destination/$file