Update Red Hat Repositories page dropdown to Patternfly 4 component
This page has a dependency on jQuery which recently caused a regression in production. Better to get jQuery out of our react stack. PF4 has a multiple select component that should do the trick to remove bootstrap-select which depends on jquery.
select component: https://www.patternfly.org/v4/components/select#multiple
recent regression (prod only): https://projects.theforeman.org/issues/32711