tools: fix --v8-non-optimized-debug for v18.x
Disable SLOW_DCHECKs on v18.x because they don't compile without the patches in https://bugs.chromium.org/p/v8/issues/detail?id=12887 if used in constexpr, which can happen in other floated patches.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Disable SLOW_DCHECKs on v18.x because they don't compile without the patches in https://bugs.chromium.org/p/v8/issues/detail?id=12887 if used in constexpr, which can happen in other floated patches.