Update Liblouis to version 3.5.0 (#7839)
* * No longer use liblouis pass1only by default
* Update liblouis to 3.4.0
* Add new Lithuanian 6 dot braille table and rename the existing Lithuanian table to Lithuanian 8 dot in the interface
* Added unit test for braille table existence
* Added a unit test to test whether all renamed braille tables are part of the actual tables list
* Include Romanian braille table
* Update Liblouis to v3.4.1-pre1
* Review action
* Remove pass1only support
* Reflect liblouis changes with regard to Mongolian
* Added Ukrainian braille table
* Update submodule to 3.5.0 final
* Update readme to reflect liblouis 3.5
* Treat Mongolean grade 2 as contracted
* Removed French tables and added them to renamedTables as suggested by liblouis
* Fix duplicate method doc string for unit test
* Fix inconsistent case in French grade 2 table description
