Cosmos3 edge support (#14181)
* Add Cosmos3 Edge modular pipeline support
* Remove Cosmos3 conversion script
* Refine Cosmos3 Edge norm selection
* Use internal Cosmos3 modular test fixture
* Use real VAE in Cosmos3 pipeline tests
* Align Cosmos3 Edge tests with conventions
* Fix Cosmos3 callbacks on Python 3.10
* Address Cosmos3 modular test feedback
* Address Cosmos3 pipeline test review comments
