CodeGen from PR 15011 in Azure/azure-rest-api-specs

[NetAppFiles] Anf 13322 net app files api version 2021 06 01 (#15011)

* Api version bump

* Apply 2021-06-01 changes

* Update readme

* Change default on enum

* Add s360 fixes

* Add missing systemdata

* Change defaultUserQuotaInKiBs default to 0

Co-authored-by: Audunn Baldvinsson <[email protected]>

Author: SDKAuto