Extract EE-specific code from spec/factories/services.rb

Signed-off-by: Rémy Coutable <remy@rymai.me>

ee/spec/factories/services.rb

+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :gitlab_slack_application_service do
+    project
+    active true
+    type 'GitlabSlackApplicationService'
+  end
+end

spec/factories/services.rb

@@ -62,10 +62,4 @@ FactoryBot.define do
       project_key: 'jira-key'
     )
   end
-
-  factory :gitlab_slack_application_service do
-    project
-    active true
-    type 'GitlabSlackApplicationService'
-  end
 end