Redmine

This patch fixes random test failures that happen because Settings state is not consistent when tests start.

It's likely that random test failures like the ones below are caused by a Settings cache from previous tests affecting the current test.

https://github.com/redmine/redmine/actions/runs/16861987913/job/47763524042

Failure:
MenuManagerTest#test_cross_project_menu_should_hide_item_if_module_is_not_enabled_for_any_project [test/integration/lib/redmine/menu_manager_test.rb:144]:
Expected at least 1 element matching "#projects-index", found 0.
Expected 0 to be >= 1.

bin/rails test test/integration/lib/redmine/menu_manager_test.rb:123

https://github.com/hidakatsuya/redmine/actions/runs/16886193502/job/47834442073

ailure:
NewsControllerTest#test_show [test/functional/news_controller_test.rb:78]:
Expected: "JS eCookbook first release !" 
Actual: "eCookbook first release !".
Expected 0 to be >= 1.

bin/rails test test/functional/news_controller_test.rb:74

This patch ensures Setting.clear_cache is run after every test completes. It's believed that no tests require the previous setting state.

I have verified that all tests are passing consistently over at least three runs.