Make Codecov refrain from commenting on a PR if coverage has not changed (#11788)

* Make Codecov refrain from commenting on a PR if coverage has not changed

* Disable GH annotations on PRs from CodeCov

codecov.yml

@@ -7,3 +7,7 @@ coverage:
     patch:
       default:
         informational: true
+comment:
+  require_changes: true
+github_checks:
+    annotations: false