Allow removing of compile artifacts after every crate publish to free up disk space

We noticed in https://github.com/rust-lang/rust-analyzer/issues/15732 that crates appear to be built multiple times, which fills up the disk. Is this intended?

EDIT: here is [our workflow](https://github.com/rust-lang/rust-analyzer/blob/master/.github/workflows/autopublish.yaml). Just noticed the logs have expired, will post an update when it happens again.