Merge pull request #40397 from rhcs-dashboard/update-texts

mgr/dashboard: Improve descriptions in some parts of the dashboard

Reviewed-by: Aashish Sharma <aasharma@redhat.com>
Reviewed-by: Alfonso Martínez <almartin@redhat.com>
Reviewed-by: Avan Thakkar <athakkar@redhat.com>
Reviewed-by: Laura Paduano <lpaduano@suse.com>

diff --cc src/pybind/mgr/dashboard/services/access_control.py
Simple merge

diff --cc src/pybind/mgr/dashboard/tests/test_access_control.py
Simple merge