mgr/dashboard: Always use fast angular unit tests

mgr/dashboard: Always use fast angular unit tests

This will replace the current approach having a fast testing workaround
that didn't fully work on every test. Now using ng-bullet's optimization
works with every test, therefore there is no need to keep the old
configuration files and use the slow testing on Jenkins.

Fixes: https://tracker.ceph.com/issues/45433
Signed-off-by: Stephan Müller <smueller@suse.com>