Improved `pnpm clean` (#45312)
When incompatibilities with upgrades to `swc` occur between releases,
these changes expand the existing `pnpm clean` script to additionally
run any `clean` script under any of the lerna packages. In this case, a
new script was created under `packages/next-swc` that removes
`packages/next-swc/native/*`, allowing the default to automatically use
the WASM build.
Users wanting to reset their repository can now run:
```sh
pnpm clean
```
Future packages or outputs that are built should have their `clean`
script remove them to allow for easy repository resetting.
