Convert Admin Audit Events search filter to use the new Pajama's component

Problem to solve

The current Admin Audit Events search filter uses a HAML template to generate the filter dropdowns and is limited to only 1 event type per search.

Proposal

In relation to the work for #32388 (closed) we need to move this to a Vue component using the new GlFilteredSearch Pajama's component instead. This will greatly improve the usability of the search functionality for the user and allow us to tie it to a new or updated API to make future work easier.