Use `rustup self uninstall -y` instead of manually removing folders to
ensure a proper cleanup of the rustup installation, including cargo and
init command injections in shell rc files.
Failing to do so can cause issues, such as bash failing to run in a `set
-e` environment due to a missing `$HOME/.cargo/env`, for example.
Signed-off-by: Guilherme Gallo <guilherme.gallo@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33519>
a663f97d2d