bug#70299: 30.0.50; go-ts-mode + tree-sitter-go@v0.20.0 no highlighting

[Eli Zaretskii <eliz@gnu.org>]

> Date: Tue, 9 Apr 2024 00:43:57 +0100
> From:  Martin via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> - emacs -Q;
> - M-x treesit-install-language-grammar
>   - go
>   - github.com/tree-sitter/tree-sitter-go
> 
> - Open up a new buffer and use go-ts-mode
> - Write some go-code 
> ```
> package my_pkg
> type myStruct struct {}
> func MyFunc(x context.Context) error {}
> ```
> - Observe that there is no syntax highlighting
> - Observe that treesit-explore-mode seems to work properly
> - Conclude that there is something wrong with go-ts-mode's
>   highlighting. There is highlighting with tree-sitter-go v0.19.1, but
>   that grammar also seems to come with some bugs.

Isn't this a duplicate of bug#70296?