Suppress diagnostics from // HACK comments (#91301)

* Suppress diagnostics from // HACK comments

analysis_options.yaml

@@ -27,8 +27,9 @@ analyzer:
     missing_required_param: warning
     # treat missing returns as a warning (not a hint)
     missing_return: warning
-    # allow having TODOs in the code
+    # allow having TODO/HACK comments in the code
     todo: ignore
+    hack: ignore
     # allow self-reference to deprecated members (we do this because otherwise we have
     # to annotate every member in every test, assert, etc, when we deprecate something)
     deprecated_member_use_from_same_package: ignore