This removes many wasm-specific code paths from codegen, such that
includes from src/wasm can be removed. After src/wasm is fully excluded
from no-wasm builds, we can also clean up unused enum values, but for
now they are still being referenced.

R=mslekova@chromium.org

Bug: v8:11238
Change-Id: I526ac931f023a57f70b5248befa2733ad10ce9ce
Cq-Include-Trybots: luci.v8.try:v8_linux64_no_wasm_compile_rel
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2732011
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73189}