Disable `disable_anonymous_search` in specs

This is an ops feature flag that will only be enabled in exceptional
circumstances so it's better to disable this by default so that we don't
have to update a lot of specs

spec/finders/issues_finder_spec.rb

@@ -569,14 +569,18 @@ RSpec.describe IssuesFinder do
         end
 
         context 'with anonymous user' do
-          let_it_be(:public_project, reload: true) { create(:project, :public, group: subgroup) }
-          let_it_be(:issue6, reload: true) { create(:issue, project: public_project, title: 'tanuki') }
-          let_it_be(:issue7, reload: true) { create(:issue, project: public_project, title: 'ikunat') }
+          let_it_be(:public_project) { create(:project, :public, group: subgroup) }
+          let_it_be(:issue6) { create(:issue, project: public_project, title: 'tanuki') }
+          let_it_be(:issue7) { create(:issue, project: public_project, title: 'ikunat') }
 
           let(:search_user) { nil }
           let(:params) { { search: 'tanuki' } }
 
           context 'with disable_anonymous_search feature flag enabled' do
+            before do
+              stub_feature_flags(disable_anonymous_search: true)
+            end
+
             it 'does not perform search' do
               expect(issues).to contain_exactly(issue6, issue7)
             end
@@ -1281,7 +1285,7 @@ RSpec.describe IssuesFinder do
   end
 
   describe '#use_cte_for_search?' do
-    let(:finder) { described_class.new(user, params) }
+    let(:finder) { described_class.new(nil, params) }
 
     context 'when there is no search param' do
       let(:params) { { attempt_group_search_optimizations: true } }
@@ -1300,7 +1304,7 @@ RSpec.describe IssuesFinder do
     end
 
     context 'when all conditions are met' do
-      context 'uses group search optimization' do
+      context "uses group search optimization" do
         let(:params) { { search: 'foo', attempt_group_search_optimizations: true } }
 
         it 'returns true' do
@@ -1309,7 +1313,7 @@ RSpec.describe IssuesFinder do
         end
       end
 
-      context 'uses project search optimization' do
+      context "uses project search optimization" do
         let(:params) { { search: 'foo', attempt_project_search_optimizations: true } }
 
         it 'returns true' do

spec/spec_helper.rb

@@ -305,6 +305,9 @@ RSpec.configure do |config|
       # For more information check https://gitlab.com/gitlab-com/gl-infra/production/-/issues/4321
       stub_feature_flags(block_issue_repositioning: false)
 
+      # This is an ops feature flag that's disabled by default
+      stub_feature_flags(disable_anonymous_search: false)
+
       # Disable the refactored top nav search until there is functionality
       # Can be removed once all existing functionality has been replicated
       # For more information check https://gitlab.com/gitlab-org/gitlab/-/issues/339348