[SSSD] [sssd PR#5784][comment] proxy: allow removing group members

[ikerexxe]

URL: https://github.com/SSSD/sssd/pull/5784
Title: #5784: proxy: allow removing group members

ikerexxe commented:
"""
> Wouldn't it make sense to instead lookup GID of SYSDB_MEMBEROF DN and compare GIDs (numerical values)?

Yes, so I've updated the PR accordingly. Nowadays, a list of GIDs is composed from the cache and this is compared with the actual GIDs list. This should optimize the execution flow compared with the previous proposed patch.

"""

See the full comment at https://github.com/SSSD/sssd/pull/5784#issuecomment-936256484