Dev botservice microsoft.bot service 2022 06 15 preview (#19687)

* Adds base for updating Microsoft.BotService from version preview/2021-05-01-preview to version 2022-06-15-preview

* Updates readme

* Updates API version in new specs and examples

* add email related and outlook

* Update readme

* Correct some elements

* fix model issue

* Fix prettier issues.

* add QnAMakerEndpointKeys api

* fix the prettierCheck

Co-authored-by: hualxie <xieofxie@126.com>
Co-authored-by: Chang Liu <liuchang@microsoft.com>
Co-authored-by: Hongyang Du <hond@microsoft.com>

custom-words.txt

@@ -166,6 +166,7 @@ australiaeast
 australiasoutheast
 authenticatable
 Authenticode
+authkey
 authorityURL
 authorizationrules
 authpriv
@@ -1472,6 +1473,7 @@ ondemandgc
 onedeploy
 onmachine
 omex
+Omnichannel
 onmicrosoft
 ONNX
 Onprem