Added ANTLR based Go Parser module

[lkishalmi]

This is a generated Lexer/Parser Library for Go.

I'm going to add another module languages.go soon. Since the discussion on the devops cluster has died off, I'm going to add these into the ide cluster, till we find something better.

[lkishalmi]

I had to make this module show in auto updates, in order to satisfy the commit validation. I'm going to revert that in the upcoming languages.go PR.

[mbien]

although this is using a third party grammar it might be still worth to add a basic test.

[lkishalmi]

@mbien Well, it is entirely third-party, just downloaded and generated code. I do not exactly know how, but it seems to be tested on these files: https://github.com/antlr/grammars-v4/tree/master/golang/examples

[matthiasblaesing]

Looks sane to me. I think it would have been better to get this in together with filetype wiring, but still ok.