Feature/Respect Image Proportions for the Image Size Control Manual Inputs

[jomurgel]

What?

Adds a Toggle to optionally constrain the proportions of the ImageSizeControl feature, default false (mimics current WP behaviors).

Why?

Closes: #21918

The classic editor, when inserting images had the option of resizing in the media selector which retrained the image ratio by default (and was actually forced). Inserting an image and changing the aspect ratio (and not cropping the image) is bad practice, and while the Handles on the image retain the aspect ratio, there have been some reports of difficulty on mobile and is generally confusing to have different behaviors between the two interfaces.

This PR adds an image ratio lock and brings the two resize features in line with one another, though provides the ability to opt-out if necessary.

How?

• Added a toggle lock icon that locks the proportions of the image when the image width or height are modified independently of one another.
• Defaults to true, opt-out behavior.

Testing Instructions

1. Create a new post or page.
2. Add an image block from any source (upload, URL, media library, etc).
3. Confirm that the locking icon is present between the width and height icons (screenshots below).
4. Confirm that the locking icon is closed (lock) and the tooltip reads, "Unlock image proportions".
5. Modify the width or height in either direction and confirm that the other value is updated automatically and that the image proportions are retained.
6. Click the locking icon and confirm that the tooltip reads, "Lock image proportions".
7. Confirm that when unlocked the height and width of the images are set independently from one another.
8. Confirm that if the locking icon is clicked (to locked state) the respective height or width (the value note being edited last) is updated and the image aspect ratio is reset.
9. Confirm that the image size presets, reset, and handlebars on the image are functional as expected.
10. Confirm that the behavior is consistent for portrait, landscape, and square images.

Screenshots or screencast

Screen.Recording.2022-09-23.at.5.35.02.PM.mp4

[skorasaurus]

Thanks for your work on this but this has been largely done in #51545 ; please comment if you have any questions