We accidentally compiled the source for Debug-Evaluate on Wasm frames
twice, and used the first script result as outer function info for the
second, actual compile (which goes via the `eval` machinery).

Also unify DebugEvaluate::Local and DebugEvaluate::WebAssembly, since
they are essentially very similar, except for the context.

Bug: chromium:1127914
Change-Id: I8eb85c128c05ab1d4fcb73061de89b0942d1e5c8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2605198
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Auto-Submit: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71890}