feat: added dialogflow_assist_answer

feat: added session_ttl
feat: added human_agent_side_config
feat: added suggestion_input
feat: added suggest_dialogflow_assists_response
feat: added suggest_entity_extraction_response

PiperOrigin-RevId: 542021587

Source-Link: googleapis/googleapis@f40416d

Source-Link: googleapis/googleapis-gen@04ca491
Copy-Tag: eyJwIjoiYXBpcy9Hb29nbGUuQ2xvdWQuRGlhbG9nZmxvdy5WMi8uT3dsQm90LnlhbWwiLCJoIjoiMDRjYTQ5MWRlYzhmMzUxNzNlZTU5OWQ3ZWQwNzkzNmI0MDg2ZTk2ZCJ9

apis/Google.Cloud.Dialogflow.V2/Google.Cloud.Dialogflow.V2/AnswerRecord.g.cs

@@ -1383,8 +1383,8 @@ public sealed partial class AnswerFeedback : pb::IMessage<AnswerFeedback>
     /// <summary>
     /// Indicates whether the answer/item was clicked by the human agent
     /// or not. Default to false.
-    /// For knowledge search, the answer record is considered to be clicked if the
-    /// answer was copied or any URI was clicked.
+    /// For knowledge search and knowledge assist, the answer record is considered
+    /// to be clicked if the answer was copied or any URI was clicked.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]

apis/Google.Cloud.Dialogflow.V2/Google.Cloud.Dialogflow.V2/Conversation.g.cs

@@ -2826,7 +2826,7 @@ public sealed partial class SuggestConversationSummaryRequest : pb::IMessage<Sug
     public const int AssistQueryParamsFieldNumber = 5;
     private global::Google.Cloud.Dialogflow.V2.AssistQueryParameters assistQueryParams_;
     /// <summary>
-    /// Parameters for a human assist query.
+    /// Parameters for a human assist query. Only used for POC/demo purpose.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]