Allow for filtering results by language on multilingual sites

A dropdown menu to select the filter is on the find_text form at /admin/find-text. Search results only return field values with that langcode.

changed title from 8.x 1.x to {+https://www.drupal.org/project/find_text/issues/3380505+}

changed title from {-https://www.drupal.org/project/find_text/issues/3380505-} to Allow for filtering results by language on multilingual sites

approved this merge request

merged