Comptime is not required for arguments of comptime only types after first generic argument

[alexnask]

Example

fn Matrix(
    comptime T: type,
    width: comptime_int,
    height: comptime_int,
) type {
    return [height][width]T;
}

width and heigth should be checked and require comptime even if they are actually type erased.

[cristobal-montecino]

See also #5672

[Vexu]

Fixed in self-hosted, tested in test/cases/compile_errors/comptime_parameter_not_declared_as_such.zig.

[Vexu]

Fixed in self-hosted, tested in test/cases/compile_errors/comptime_parameter_not_declared_as_such.zig.