[bug fix] GLM-Image fit new get_image_features API

[JaredforReal]

What does this PR do?

Upstream transformers upgraded to V5, and GlmImageForConditionalGeneration.get_image_features() won't take return_dict as an explicit arg.
Downstream Caller is recommended to pass return_dict=True and use .pooler_output to adapt to V5 transformers

Fixes # (issue)

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[JaredforReal]

tested and works fine, @yiyixuxu PTAL, thanks!

[Copilot]

Pull request overview

This PR updates the GLM-Image pipeline to maintain compatibility with transformers V5, which changed the API for GlmImageForConditionalGeneration.get_image_features(). The method no longer accepts return_dict as an explicit parameter, and callers must now access the .pooler_output attribute from the returned object.

Changes:

• Modified get_image_features() call to remove return_dict=False parameter and access .pooler_output attribute instead
• Updated image feature extraction for image-to-image mode to work with transformers V5 API

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