no-flags-array should ignore buildFlagsArray

[SuperSandro2000]

I just noticed that buildFlagsArray gets flagged by no-flags-array (NixOS/nixpkgs#112814 (comment)). Even thou it is valid I think we want to ignore that or change buildGoModule to use nix instead of bash.

[jtojnar]

Well, Go packages are precisely what lead me to introduce the check in the first place (see NixOS/nixpkgs#112054). As soon as someone adds a second flag, the whole thing will break.

[jtojnar]

Alternative would be only showing the error once there is actually more than one flag, since it technically works with a single one.

[zowoq]

Alternative would be only showing the error once there is actually more than one flag

Doing this would be good for now until we come up with a proper fix for buildGo{Module,Package}.