Remove import_github_repo_spec tests from reliable

To unblock MRs

qa/qa/specs/features/api/1_manage/import_github_repo_spec.rb

 # frozen_string_literal: true
 
 module QA
-  RSpec.describe 'Manage', :github, :requires_admin, :reliable do
+  RSpec.describe 'Manage', :github, :requires_admin do
     describe 'Project import', issue: 'https://gitlab.com/gitlab-org/gitlab/-/issues/353583' do
       let!(:api_client) { Runtime::API::Client.as_admin }
       let!(:group) { Resource::Group.fabricate_via_api! { |resource| resource.api_client = api_client } }

qa/qa/specs/features/browser_ui/1_manage/project/import_github_repo_spec.rb

 # frozen_string_literal: true
 
 module QA
-  RSpec.describe 'Manage', :reliable, :github, :requires_admin do
+  RSpec.describe 'Manage', :github, :requires_admin do
     describe 'Project import' do
       let(:github_repo) { 'gitlab-qa-github/import-test' }
       let(:api_client) { Runtime::API::Client.as_admin }