🚨🚨 Fix initialization of Mask2Former (#38864)
* Correctly fix init
Co-authored-by: BUI Van Tuan <buivantuan07@gmail.com>
* add back the block, breaking BC but this is correct author's code
* override the test for params needing it
---------
Co-authored-by: BUI Van Tuan <buivantuan07@gmail.com>