fixes #19528 - rewrite FiltersHelperOverrides to support autoload
Replaces class-level filter search overrides storage with a query against Foreman::Plugin, allowing the class to be reloaded and tested safely. Removes another 'registry' class.
Related issues
Refactor #19528: Move FiltersHelperOverrides out of app/registries/ to permit autoloading
fixes #19528 - rewrite FiltersHelperOverrides to support autoload
Replaces class-level filter search overrides storage with a query
against Foreman::Plugin, allowing the class to be reloaded and tested
safely. Removes another 'registry' class.