Issue 51187 - UI - stop importing Cockpit's PF css
Bug Description: Cockpit has deprecated its patternfly css, so plugins
need to provide their own.
Fix Description: Used the same process cockpit-podman used. Was able to
consolidate the our CSS files so we don't have to ship
ds.css and branding.css. This also allowed us to remove
all the ds.css imports for almost every jsx file.
Special thanks to Martin Pitt for helping with this patch!
relates: https://pagure.io/389-ds-base/issue/51187
Reviewed by: spichugi(Thanks!)