[Model] Add SLANeXt Model Support (#43707)
* add SLANeXt models
* refine codes
* refine codes
* refine models
* refine codes
* refine codes
* fix
* fix
* fix
* fix
* fix
* fix
* fix
* fix
* fix
* fix
* fix
* fix
* fix
* fix
* lets commit this first
* img processor and tests
* more fixup
* fix init
* it def cannot
* more fixups
* style
* fix init
* nit
* fix
* repo concistency fixes
* feedback from yoni
* style
* fix
* add this
* sync
* fixes
* oops
* change the auto here
* fix
* refine codes
* refine codes
* update config
* fix
---------
Co-authored-by: vasqu <antonprogamer@gmail.com>
