This is a reland of 6ebccbd1

Original change's description:
> [wasm] Deduplicate wasm scripts
> 
> R=clemensb@chromium.org
> 
> Bug: v8:6847
> Change-Id: I4509a7011a0d32f5bbd2eabf3d2ee6ef5304263d
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2124320
> Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
> Reviewed-by: Clemens Backes <clemensb@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66981}

Bug: v8:6847
Change-Id: I74f51b9b15df74de800fbbf031515d26aaa70dbc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2135735Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67006}