* unifiedrole: Add CS3ResourcePermissionsToLibregraphActions
Add function to convert CS3ResourcePermsissions to libregraph actions
* unifiedrole: Fix strings for the UnifiedRoleConditionSelf
The "Self/Owner/Grantee" string are not part the the constraint value
* graph: Move getRoleDefinitionList to unifiedrole module
rename it to GetBuiltinRoleDefinitionList and make it public
* graph: turn libregraph resource actions into string constants
* graph/sharedbyme: Set the correct roles (or actions) on permissions
Try to map CS3 resource permissions on a share to one of the default libregraph
UnifiedRoleDefinitions. If a match if found return the roleid in 'permissions.roles'
attribute of the response. If no match if found convert the
ResourcePermissions in to `libre.graph.permissions.actions` and return
those in the response.
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