MAX_PIXELS in the env variables is not working when model_type is mimo_vl

[zhshj0110]

MAX_PIXELS=548800 \
swift xxx \
    --model_type mimo_vl \
    --model xxxxx \
    ......

MAX_PIXELS in the env variables is not working when model_type is mimo_vl, but it can work if I set the model_type as qwen2_5_vl.

This does not seem to be a bug, but it may affect the debug experience.

[Jintao-Huang]

It works in my tests.

ms-swift/swift/llm/model/model/qwen.py

Line 703 in 68a6f80

get_model_tokenizer_qwen2_5_vl,