Add priority_searchable concern to select search type

app/assets/javascripts/search/index.js

app/assets/javascripts/search/store/state.js

...cripts/search/topbar/components/search_type_indicator.vue

app/presenters/search_service_presenter.rb

app/views/search/show.html.haml

ee/app/presenters/ee/search_service_presenter.rb

...services/concerns/search/advanced_and_zoekt_searchable.rb

ee/app/services/ee/search/global_service.rb

ee/app/services/ee/search/group_service.rb

ee/app/services/ee/search/project_service.rb

ee/app/services/ee/search_service.rb

ee/spec/controllers/ee/search_controller_spec.rb

ee/spec/features/search/elastic/project_search_spec.rb

ee/spec/presenters/ee/search_service_presenter_spec.rb

ee/spec/services/search/global_service_spec.rb

ee/spec/services/search/group_service_spec.rb

ee/spec/services/search/project_service_spec.rb

ee/spec/services/search_service_spec.rb

...nd/search/topbar/components/search_type_indicator_spec.js

spec/presenters/search_service_presenter_spec.rb