Use current query not altered query for the breadcrumb

In function apachesolr_search_execute() we cache the current query after the prepare hook, but then we let it be further modified on apachesolr_modify_query() (e.g. adding nodeaccess and other filters) before executing the query.

This leads to a bug where those later filters are exposed in the breadcrumb since we use $query->get_breadcrumb() with the changes introduced by apachesolr_modify_query().