Move CloudinaryAdapter into cloudinary package

[timleslie]

Moves the cloudinary adapter implementation into the package where it is used. I've confirmed the cloudinary tests still pass 👍

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🦋 Changeset detected

Latest commit: ff2ef04

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
@keystone-next/file-adapters-legacy	Major
@keystone-next/cloudinary	Patch

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