Full update of language_groups (Arabic script only)

• Out of 313 Wikipedia languages, 18 of them use the Arabic script (either directly or using a script that is derived from Arabic).
• Manually checked every one of those using Special:Random (20 times) and also checked Special:AllPages to see if the wiki really uses Arabic script.
• Summary of changes:
• Removed 2 languages (existing pages with Arabic titles are redirects only) and added 7 languages.
• Languages removed: bjn, tt
• Languages added: azb, fa, glk, ha, ks, lrc, mzn
• Sorted language codes alphabetically.

Change-Id: I2b430c139d239974068a7676d2e492833e6ca5a1