CodeGen from PR 14215 in Azure/azure-rest-api-specs

add AVS 2021-06-01 API (#14215)

* add AVS 2021-06-01 API

* add cmdlets custom word

* rename ScriptCmdlet cmdletDescription to description (#14218)

* Adding optional to the script parameter (#14437)

Co-authored-by: David Becher <[email protected]>

Co-authored-by: david becher <[email protected]>
Co-authored-by: David Becher <[email protected]>

Author: 3 people