Add a executable flag/code action to clean out all caches

* We are using several caches, though `hie-bios` (including its own `dist-newstyle`) and `ghcide` (including hiedb?)
* If all would go well cache should not be cleaned to fix issues but we all know not always is the case
* Users has to chase cache directories, not always well documented and wipe them all manually
* Ideally `hie-bios` could have its own command/api entry to clean its own cache and we should call it from hls/ghcide (cc @fendor)