build: compile with C++20 support when using Clang
This is required by V8 12.6+
Refs: https://github.com/v8/v8/commit/4421c3672a09788b36317b88a3f6f1e2ebadaa39 Refs: https://github.com/nodejs/node/issues/45402
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
This is required by V8 12.6+
Refs: https://github.com/v8/v8/commit/4421c3672a09788b36317b88a3f6f1e2ebadaa39 Refs: https://github.com/nodejs/node/issues/45402