from now on, not all unified roles are enabled by default, instead the available roles are hand-picked in the default setup.
For advanced use-cases, the administrator is capable to enable the desired set of available roles.
Picking roles is not easy since the uid is NOT humanly readable, therefore a cli is contained which lists the available, disabled and enabled roles.
This is an initial implementation of PATCH support on drives/{driveid}/items/{itemid}/permissions/{id}.
It focusses on updating user shares for now. It's possible to update the
expirationDate, roles and/or libregraphResourceActions.
Updating the permissions of a space root or a public link share is currently
not implemeted.
