BREAKING CHANGE: Rename `@payloadcms/plugin-cloud` to
`@payloadcms/payload-cloud`. Anyone using the existing plugin will need
to switch to using the new package.
## Why?
Since v3 will be using _fixed versioning_, all versions of `^3` must be
available. Unfortunately, the `@payloadcms/plugin-cloud` version has
already breached that version number. Renaming will allow it to be on
the same version as other monorepo packages.
Additionally, the name `plugin-cloud` is quite ambiguous and sometimes
is confused with `plugin-cloud-storage`, so using `payload-cloud` feels
like a good move to make this more evident.
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