Image: Preserve caption toggle state when replacing image in image block

[Infinite-Null]

Fixes: #66979

What?

When replacing an image block with a Media Library image that has a caption, the caption toggle state is now preserved instead of being automatically enabled. This fixes unexpected behavior in Block Patterns where captionless images would suddenly display captions after replacement.

Why?

Currently, when replacing an Image Block that has captions disabled with an image from the Media Library that has a caption, the Block Editor unexpectedly toggles on the caption setting.

Screencast:

Before Fix:

https://github.com/user-attachments/assets/d19e5d4d-e4c0-4efa-b589-bee495428824

After Fix:

https://github.com/user-attachments/assets/87372e78-d7d1-4790-bb3d-c09001476846

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Co-authored-by: Infinite-Null <ankitkumarshah@git.wordpress.org>

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