Fixes from review

ee/app/services/issues/build_from_vulnerability_service.rb

@@ -24,5 +24,3 @@ module Issues
     end
   end
 end
-
-Issues::BuildService.prepend_if_ee('EE::Issues::BuildService')

ee/changelogs/unreleased/250353-convert-issues-createfromvulnerabilityservice-to-work-similar-t.yml

----
-title: Create a new service to build an issue from a vulnerability
-merge_request: 47510
-author:
-type: added

ee/spec/services/ee/issues/build_from_vulnerability_service_spec.rb

@@ -15,7 +15,7 @@ RSpec.describe Issues::BuildFromVulnerabilityService, '#execute' do
     group.add_developer(user)
   end
 
-  context 'is a vulnerability with remediations' do
+  context 'when a vulnerability has remediations' do
     let(:vulnerability) { create(:vulnerability, :with_remediation, project: project) }
 
     context 'when raw_metadata has no remediations' do