feat!: rename @payloadcms/plugin-cloud (#8828)

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.

scripts/lib/publishList.ts

@@ -36,6 +36,7 @@ export const packagePublishList = [
   'storage-uploadthing',
 
   // Plugins
+  'payload-cloud',
   'plugin-cloud',
   'plugin-cloud-storage',
   'plugin-form-builder',