SSDM-4997 : Project Authorization bugfixes:

- project user cannot create/update a project sample
- deleting a project that is used in a project role assignment of the currently logged user breaks the project grid
- project user can turn a sample attached to an experiment or a project into a space sample even though he/she does not have access to that space
- v3 api allows to fetch/modify project role assignments even if project authorization feature is disabled

SVN: 39119