Cover Block: Add Image Resolution options

[akasunil]

What?

Fixes: https://github.com/WordPress/gutenberg/issues/58819

Why?

Resolution option were missing from cover block for background images

How?

This PR add ResolutionTool to cover block, when cover has background image

Testing Instructions

• Add cover block
• Set image as background in cover block
• Go to block setting in sidebar, Look for resolution control.

Screenshots or screencast

cover-block-image-resolution-control.webm