Persist Group Level Security Dashboard filters in URL

Right now, if I cannot share the security dashboard in a specific state, because the filters are not persisted in the URL. This Issue is for adding persistence to the filters added with https://gitlab.com/gitlab-org/gitlab-ee/issues/6240, so that one can share/bookmark a certain config for the dashboard.

Persistence is of the format:

?report_type=sast&severity=medium&severity=high&project_id=10&project_id=15