Remove loadHTMLFixture usage in `spec/frontend/filtered_search/`
This MR aims to solve #405321 (closed)
I have replaced references to loadHTMLFixture
in the following places:
spec/frontend/filtered_search/dropdown_user_spec.js:80: loadHTMLFixture(fixtureTemplate);
spec/frontend/filtered_search/dropdown_utils_spec.js:358: loadHTMLFixture(issuableListFixture);