checker: add error for field [$d('x', 2)]int = [1, 2]!

[larpon]

Add this:

vlib/v/checker/tests/struct_field_fixed_size_init_with_d_as_size_err.vv:3:31: error: cannot initialize a fixed size array field that uses `$d()` as size quantifier since the size may change via -d
    1 | struct Gin {
    2 | mut:
    3 |     juice [$d('amount', 4)]int = [1, 2, 3, 4]!
      |                                  ~~~~~~~~~~~~~
    4 | }
    5 |

for this code:

struct Gin {
mut:
	juice [$d('amount', 4)]int = [1, 2, 3, 4]!
}

fn main() {}