fix: avoid race condition when download swc wasm (#58536)
### What?
I noticed that code that was responsible for download the SWC Wasm
fallback wasn't bullet proof and there was a chance for a race
condition. The reason was that both `write` and `close` from a write
stream are async operations and it's best to wait for them to complete,
otherwise the promise returned from `body.pipeTo` could resolve before
all data has been written and the stream was closed. Right after that it
calls `rename` and it could happen that, at that point, `tempFile`
doesn't contain all the data yet which means an empty file may be
renamed into another file ending up with `path.join(cacheDirectory,
tarFileName)` being empty as well.
The fix is to wait for both `write` and `close` to be completed which
eliminates the potential race condition between the fetch and the
rename.
Co-authored-by: Tim Neutkens <tim@timneutkens.nl>
