Lithuanian street classifications update

[yuryleb]

Issue

Actually I don't speak Lithuanian but spent a lot of time to investigate European street status names for my Garmin TTS voices update project.

And my investigation shows that Lithuanian streets have different abbreviations than currently specified ones in languages/abbreviations/lt.json. Also Lithuanian OSM community uses already abbreviated street names in most cases and so proposed changes could be easily verified:

• Vydūno al.
• Vakarinis aplinkl.
• Pamėnkalnio g.
• Turžėnų kel.
• Neries krantinė - No abbreviations in OSM
• Minsko pl.
• Lukiškių skg.
• Ribiškių tak.
• Žirmūnų tiltas - No abbreviations in OSM
• Unfortunately no samples for bulvaras (boulevard).

Non-street abbreviations were moved from classifications block to abbreviations and sorted.

Tasklist

• [x] Update abbreviation file
• [x] Add changelog entry
• [ ] Review