CodeGen from PR 18760 in Azure/azure-rest-api-specs

Add CDN 2022 05 01 preview version (#18760)

* Adds base for updating Microsoft.Cdn from version stable/2021-06-01 to version 2022-05-01-preview

* Updates readme

* Updates API version in new specs and examples

* Afd Migration Swagger updates

* Addressing feedback

* Fix validation errors

* update sku type

* Fixing some validation failures

* Fix more validation issues

* Fix alignment

* Copied from stable version

* Update api response

* Update examples

* update from older version

* Copy from older version

* Fix swagger lint

* More swagger lint fixes

Author: SDKAuto