Add PHP CodeSniffer jobs for 4 extensions

CLDR, TranslationNotifications, TwnMainPage, UniversalLanguageSelector.
This needs to be merged before Change-Id
Iec223a59a72432e95bde256247f40d27c6b90f70

Change-Id: I95ba7ca87c6ce93ef97a0b7c54c88832b0a32ccf