[ACS - Call Automation] [Beta2] Api spec for 2023-06-15-preview (#24482)

* Add beta2 api spec

* add readme

* fix lines

* Fix readme

* Added repeatability

* Fix 202 long running

* Fix header

* Fix the base

* Fix check

* added x-ms-long-running-operation

* add location

* fix example

* test

* test

* test

* fix

* test

* fix test

* test

* Fix

* test

* test

* fix

* Remove LRO

* Updates as per ARB feedback

* Updates as per ARB feedback

* Fix senddtmfTones

* Fix error

* Fix send dtmf description

Author: fhaghbin-msft

custom-words.txt

@@ -498,6 +498,7 @@ codespaces
 coffeelake
 cognitiveservices
 collectiondetails
+cogservice
 colls
 colocation
 cololocation
@@ -3681,6 +3682,7 @@ onetoone
 onetomany
 manytoone
 manytomany
+ssml
 stransparent
 forceencryption
 tlsciphers