Changes to POST /v23/customers/:customerId/adGroupAds:mutate

removed the request body

removed the media type */* for the response with the status 200

added the new GENERATE_LANDING_PAGE_TEXT enum value to the results/items/adGroupAd/adGroupAdAssetAutomationSettings/items/assetAutomationType response property for the response status 200

added the new optional request property operations/items/create/ad/syntheticContentInfo

added the new optional request property operations/items/update/ad/syntheticContentInfo

added the new GENERATE_LANDING_PAGE_TEXT enum value to the request property operations/items/create/adGroupAdAssetAutomationSettings/items/assetAutomationType

added the new GENERATE_LANDING_PAGE_TEXT enum value to the request property operations/items/update/adGroupAdAssetAutomationSettings/items/assetAutomationType

added the optional property results/items/adGroupAd/ad/syntheticContentInfo to the response with the 200 status