Most notable:
- Suggest '--experimental-wasm-gc' for wasm-gc type definitions.
- Remove unused/useless fields from WasmTypeInfo.
- Put more wasm Turbofan optimizations behind '--wasm-opt'.

Change-Id: Ia298a58c2cf03964472a1445460d12ae72a5b04d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3688404Reviewed-by: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80973}