SCIM: Filtering full coverage

[HarryKodden]

Implement according to https://www.rfc-editor.org/rfc/rfc7644#section-3.4.2.2

I doubt if we can implement the functionality via SQLAlchemy operation. I think we need to do table scan and programmatic evaluation record by record:

Inspiration: https://github.com/HarryKodden/scim-sample/blob/main/code/filter.py

[oharsta]

• https://bitbucket.org/atlassian/django_scim/src/328521948443f7d155e4f4eec9ff578e1cb5f71d/django_scim/filter.py#lines-236
• https://github.com/oktadev/okta-scim-beta/blob/master/scim-server.py#L220
• https://pypi.org/project/scim2-filter-parser/

[baszoetekouw]

@HarryKodden do we actuaklly need this righjt now for the CBA?