Remove Interface cache on uninstall

[JulianGro]

Fixes: https://github.com/overte-org/overte/issues/952

This only removes the caches and logs. It does not remove user data, like the settings. It also doesn't remove any server data, since it is unclear to me what is a cache and what is user data there.

Depends on: https://github.com/overte-org/overte/pull/1809