License problem with Provider texts

[nartreb]

Summary

Some files in src/Provider (for example el_GR/Text.php) are copied from Wikipedia under a ShareAlike license which is not compatible with Faker's MIT license. Replace those.

Versions

Latest, and probably all of them, I didn't check

Self-enclosed code snippet for reproduction

# replace this with a self-enclosed usage example 
Look at the comments at the top of:
el_GR/Text.php
kk_KZ/Text.php
ro_MD/Text.php
ru_RU/Text.php
uk_UA/Text.php

Expected output

n/a

Actual output

n/a

[nartreb]

Wikipedia only permits redistribution of articles under the licenses listed here:
https://creativecommons.org/share-your-work/licensing-considerations/compatible-licenses/