Allow Image resizing using resize handles when nested in Group block

[Vedant-Gandhi]

What?

Ref #70484

Why?

The Image Block Resize Handle do not work when group block is set to fit but the dimensions can be altered using the controls.

How?

Add logic to determine if image is shrink wrapped and prevent applying max content width.

Testing Instructions

1. Create a dummy post.
2. Add a Row block and inside it add a Group Block.
3. Add an image inside group block and resize it using resize handles.

Working Demo

20260317193023126.mp4

[github-actions]

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Warning: Type of PR label mismatch

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