Chargeback assigments: include read_only tag categories in filter dropdown
Chargeback assigments: include read_only tag categories in filter dropdown

It seems the condition was simply copied from other contexts.
Here we merely want to read tags, which should be allowed.

https://bugzilla.redhat.com/show_bug.cgi?id=1388659
(transferred from ManageIQ/manageiq@199668bff513a6bb43cc7cecc098287823aa2242)

ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic