Add `--override` to `uninstall`

[Rotzbua]

Description of the new feature / enhancement

Current only install provides an option to pass a string directly to the installer. It would be useful to have this option also for the uninstall process.

Use cases:

• installation was done with override and now required for the uninstallation
• buggy uninstaller which required special input
• simple workaround for more difficult implementations like #1885#
• manually provide silent flag for uninstallers which do not set a silentuninstall registry entry #1368

Proposed technical implementation details

Same as install.