🌋 Add support for LLaVA-Next in `DPOTrainer` #6354

Job	Run time
Tests without optional dependencies	10m 27s
Check code quality	13s
Tests (3.9, ubuntu-latest)	20m 50s
Tests with dev dependencies	17m 39s
Tests (3.9, windows-latest)	18m 33s
Tests with minimum versions	17m 2s
Tests (3.10, ubuntu-latest)	17m 53s
Tests (3.10, windows-latest)	18m 25s
Tests (3.11, ubuntu-latest)	17m 13s
Tests (3.11, windows-latest)	21m 56s
Tests (3.12, ubuntu-latest)	19m 49s
Tests (3.12, windows-latest)	18m 1s
	3h 18m 1s

Provide feedback