Revert "[wasm] Refactor initializer expression handling"

This reverts commit 071a1acf.

Reason for revert: Breaks on nosse: https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux/42795/overview

Original change's description:
> [wasm] Refactor initializer expression handling
>
> Design doc: https://bit.ly/3xPxWUe
>
> This CL introduces two main changes:
> - Initializer expressions are now decoded by WasmFullDecoder. With
>   wasm-gc, initializer expressions are no longer just constants, and
>   require complex decoding (including stack tracking). This resulted in
>   extensive code duplication.
> - Initializer expressions are not stored explicitly by module-decoder as
>   an AST (WasmInitExpr), but rather as a WireBytesRef, and are decoded
>   again during module instantiation. This should reduce memory
>   consumption for globals and other module elements with initializer
>   expressions (which has been observed in the 40MB range in some
>   real-world benchmarks.
>
> Summary of changes:
> - Add a static parameter {kFunctionBody, kInitExpression} to the
>   WasmDecoder. Use it to specialize validation to function bodies/init.
>   expressions.
> - Introduce a new Interface for the WasmFullDecoder for init.
>   expressions.
> - Differentiate between constant and non-constant opcodes in
>   WasmFullDecoder.
> - Change representation of init. expressions in WasmModule to
>   WireBytesRef.
> - Reimplement EvaluateInitExpression in module-instantiate to re-decode
>   initializer expressions.
> - Remove some now-invalid module decoder tests.
>
> Pending changes:
> - Also refactor initializer expressions for element segment entries.
> - Reintroduce deleted tests.
>
> Bug: v8:11895
> Change-Id: I76512bfe1386c8338667d30fa6db93880a1e4b42
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2972910


> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#75476}

Bug: v8:11895
Change-Id: I9fcfdedad73ef21beb9632f50305b8e678a2dff6
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2997582
Auto-Submit: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#75484}