Issue #3583570: Fix system/base library-override to match Drupal 11 core

Stable's system/base override still listed 22 CSS files, but core's system/base library now only defines 5. Most of the rest were moved to other core libraries (core/drupal.ajax, core/drupal.autocomplete, core/drupal.fieldgroup, core/drupal.item-list, core/drupal.progress, core/drupal.reset-appearance, core/drupal.tabledrag, core/drupal.tableheader, core/drupal.tablesort, core/drupal.textarea-resize) or to system/status.report, so the override was silently doing nothing for those styles. Three files (details.module.css, nowrap.module.css, position-container.module.css) no longer exist in core at all and have been dropped from the override.

Co-Authored-By: Claude Sonnet 5 noreply@anthropic.com

Closes #3583570