refs #18012 [finc] add more terms for Language Tag

* also see 18509
* use language tags in format facet
** refactor method getLanguageTag in side facets helper
*** add parameter for html attributes
*** always return html wrapped in specified element tag
*** lax check if tag key starts with term instead of full match
** fetch language tags in finc format-list for format facets on result list
* refactor language tags for performance
** avoid pregmatch, use fastest isset
*** keys in facet.ini must be case sensitive and full length
* add more tags in facet.ini