CodeGen from PR 18607 in Azure/azure-rest-api-specs

[Hub Generated] Review request for Microsoft.DesktopVirtualization to add version preview/2022-04-01-preview (#18607)

* Adds base for updating Microsoft.DesktopVirtualization from version preview/2022-02-10-preview to version 2022-04-01-preview

* Updates readme

* Updates API version in new specs and examples

* wip

* wip

* wip

* add tupe

* base

* pooled schedules

* add put for pooled schedules

* fix schedule name

* fix op names being singular warning

* fix op names being singular warning

* required props

* props not required for patch

* fix some CI errs

* updt

* updt

* updt

* make props optional for patch

* use v3 for API version param

Author: SDKAuto