model: Add DEIMv2 to Transformers (#44339)
* init: Add files (v1)
* fix: Fix ci/circleci: check_repository_consistency
* feat: Add support and test harness for all variants
* fix: Fix ci/circleci: check_repository_consistency
* refactor: Resolve review comments
* refactor: Resolve second review round
* nit: Fix copyright year
* refactor: Resolve third review round
* revert: Adhere to the pattern from yonigozlan
* nit: Clarify the docstring
* refactor: Resolve fourth review round
* refactor: Closing in on the final set of nits
* fix: Resolve merge conflicts
* fix: Add loss override and address nits
* nits: Fix minor issues
* fixup their init weights
* fix: Fix loss coupling issue
* fix date
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Co-authored-by: vasqu <antonprogamer@gmail.com>
Co-authored-by: Anton Vlasjuk <73884904+vasqu@users.noreply.github.com>
