CodeGen from PR 15648 in Azure/azure-rest-api-specs

[Hub Generated] Review request for Microsoft.Consumption to add version stable/2021-05-01 (#15648)

* Make changes based on s360

* Fix example errors

* Missed an instance of purchaseDate type

* No schema for 204

* Ran prettier

Co-authored-by: Alex Goldschmidt <[email protected]>

Author: SDKAuto