Change tests to add members using API

Due to this failure
https://gitlab.com/gitlab-org/gitlab/-/issues/212185
I've changed the way some of the effected tests add
members to groups or projects so that they use the
API which is faster and avoids the error above
without impacting the integrity of the test.

qa/qa/specs/features/browser_ui/2_plan/issue/check_mentions_for_xss_spec.rb

@@ -3,33 +3,42 @@
 module QA
   context 'Plan', :reliable do
     describe 'check xss occurence in @mentions in issues', :requires_admin do
-      it 'mentions a user in a comment' do
+      let(:user) do
+        Resource::User.fabricate_via_api! do |user|
+          user.name = "eve <img src=x onerror=alert(2)&lt;img src=x onerror=alert(1)&gt;"
+          user.password = "test1234"
+        end
+      end
+
+      let(:project) do
+        Resource::Project.fabricate_via_api! do |project|
+          project.name = 'xss-test-for-mentions-project'
+          project.add_member(user)
+        end
+      end
+
+      let(:issue) do
+        Resource::Issue.fabricate_via_api! do |issue|
+          issue.project = project
+        end
+      end
+
+      before do
         QA::Runtime::Env.personal_access_token = QA::Runtime::Env.admin_personal_access_token
 
         unless QA::Runtime::Env.personal_access_token
           Flow::Login.sign_in_as_admin
         end
 
-        user = Resource::User.fabricate_via_api! do |user|
-          user.name = "eve <img src=x onerror=alert(2)&lt;img src=x onerror=alert(1)&gt;"
-          user.password = "test1234"
-        end
-
         QA::Runtime::Env.personal_access_token = nil
 
         Page::Main::Menu.perform(&:sign_out) if Page::Main::Menu.perform { |p| p.has_personal_area?(wait: 0) }
 
         Flow::Login.sign_in
-
-        project = Resource::Project.fabricate_via_api! do |project|
-          project.name = 'xss-test-for-mentions-project'
       end
 
-        Flow::Project.add_member(project: project, username: user.username)
-
-        Resource::Issue.fabricate_via_api! do |issue|
-          issue.project = project
-        end.visit!
+      it 'mentions a user in a comment' do
+        issue.visit!
 
         Page::Project::Issue::Show.perform do |show|
           show.select_all_activities_filter

qa/qa/specs/features/ee/browser_ui/3_create/repository/code_owners_spec.rb

@@ -16,30 +16,38 @@ module QA
         ]
       end
 
-      before do
-        # Add two new users to a project as members
-        Flow::Login.sign_in
+      let(:user) do
+        Resource::User.fabricate_or_use do |user|
+          user.name = Runtime::Env.gitlab_qa_username_1
+          user.password = Runtime::Env.gitlab_qa_password_1
+        end
+      end
 
-        @user = Resource::User.fabricate_or_use(Runtime::Env.gitlab_qa_username_1, Runtime::Env.gitlab_qa_password_1)
-        @user2 = Resource::User.fabricate_or_use(Runtime::Env.gitlab_qa_username_2, Runtime::Env.gitlab_qa_password_2)
+      let(:user2) do
+        Resource::User.fabricate_or_use do |user2|
+          user2.name = Runtime::Env.gitlab_qa_username_2
+          user2.password = Runtime::Env.gitlab_qa_password_2
+        end
+      end
 
-        @project = Resource::Project.fabricate_via_api! do |project|
+      let(:project) do
+        Resource::Project.fabricate_via_api! do |project|
           project.name = "codeowners"
         end
-        @project.visit!
-
-        Page::Project::Menu.perform(&:go_to_members_settings)
-        Page::Project::Settings::Members.perform do |members_page|
-          members_page.add_member(@user.username)
-          members_page.add_member(@user2.username)
       end
+
+      before do
+        project.add_member(user)
+        project.add_member(user2)
       end
 
       it 'displays owners specified in CODEOWNERS file' do
+        Flow::Login.sign_in
+        project.visit!
         codeowners_file_content =
           <<-CONTENT
-            * @#{@user2.username}
-            *.txt @#{@user.username}
+            * @#{user2.username}
+            *.txt @#{user.username}
           CONTENT
         files << {
           name: 'CODEOWNERS',
@@ -48,27 +56,27 @@ module QA
 
         # Push CODEOWNERS and test files to the project
         Resource::Repository::ProjectPush.fabricate! do |push|
-          push.project = @project
+          push.project = project
           push.files = files
           push.commit_message = 'Add CODEOWNERS and test files'
         end
-        @project.visit!
+        project.visit!
 
         # Check the files and code owners
         Page::Project::Show.perform do |project_page|
           project_page.click_file 'file.txt'
         end
 
-        expect(page).to have_content(@user.name)
-        expect(page).not_to have_content(@user2.name)
+        expect(page).to have_content(user.name)
+        expect(page).not_to have_content(user2.name)
 
-        @project.visit!
+        project.visit!
         Page::Project::Show.perform do |project_page|
           project_page.click_file 'README.md'
         end
 
-        expect(page).to have_content(@user2.name)
-        expect(page).not_to have_content(@user.name)
+        expect(page).to have_content(user2.name)
+        expect(page).not_to have_content(user.name)
       end
     end
   end