CodeGen from PR 14545 in Azure/azure-rest-api-specs

[Hub Generated] Review request for Microsoft.StorageCache to add version stable/2021-05-01 (#14545)

* Adds base for updating Microsoft.StorageCache from version stable/2021-03-01 to version 2021-05-01

* Updates readme

* Updates API version in new specs and examples

* 2021-05-01 API Changes

* prettier fix

* Lintdiff fix

* Add create only fields

* Create only tag for CacheIdentity

* Create only tag for CacheIdentity

* Remove create only for key rotation

* Fix s360 errors

* Fix read only

* Revert package-lock.json

* Revert package-lock.json

Author: SDKAuto