Rollup merge of #120434 - fmease:revert-speeder, r=petrochenkov

Revert outdated version of "Add the wasm32-wasi-preview2 target"

An outdated version of #119616 was merged in rollup #120309.
This reverts those changes to enable #119616 to “retain the intended diff” after a rebase.
```@rylev``` has agreed that this would be the cleanest approach with respect to the history.
Unblocks #119616.

r? ```@petrochenkov``` or compiler or libs

Author: GuillaumeGomez