Add InternImage-H Results

[praeclarumjj3]

This PR enables running OneFormer with the InternImage-H backbone.

TODO

• [x] Train on ADE20K with 896x896 image resolution and emb_dim=256.
• [x] Train on Cityscapes with emb_dim=256.
• [x] Train on COCO with emb_dim=1024.
• [x] Train on Mapillary with emb_dim=1024.
• [ ] Finetune ADE20K and Cityscapes with emb_dim=1024.