Release v4.41.1 Fix PaliGemma finetuning, and some small bugs

Release v4.41.1

Fix PaliGemma finetuning:

The causal mask and label creation was causing label leaks when training. Kudos to @probicheaux for finding and reporting!

• a755745 : PaliGemma - fix processor with no input text (#30916) @hiyouga
• a25f7d3 : Paligemma causal attention mask (#30967) @molbap and @probicheaux

Other fixes:

• bb48e92: tokenizer_class = "AutoTokenizer" Llava Family (#30912)
• 1d568df : legacy to init the slow tokenizer when converting from slow was wrong (#30972)
• b1065aa : Generation: get special tokens from model config (#30899) @zucchini-nlp

Reverted 4ab7a28