Merge public_permissions in project policy context

Difference:

        >> a - b
        => []
        >> b - a
        => []

spec/policies/project_policy_spec.rb

@@ -14,14 +14,6 @@ RSpec.describe ProjectPolicy do
   let_it_be(:admin) { create(:admin) }
   let(:project) { create(:project, :public, namespace: owner.namespace) }
 
-  let(:public_permissions) do
-    %i[
-      download_code fork_project read_commit_status read_pipeline
-      read_container_image build_download_code build_read_container_image
-      download_wiki_code read_release
-    ]
-  end
-
   let(:owner_permissions) do
     %i[
       change_namespace change_visibility_level rename_project remove_project

spec/support/shared_contexts/policies/project_policy_shared_context.rb

@@ -60,9 +60,9 @@ RSpec.shared_context 'ProjectPolicy context' do
 
   let(:public_permissions) do
     %i[
-      download_code fork_project read_commit_status read_pipeline
-      read_container_image build_download_code build_read_container_image
-      download_wiki_code read_release
+      build_download_code build_read_container_image download_code
+      download_wiki_code fork_project read_commit_status read_container_image
+      read_pipeline read_release
     ]
   end