Add signatureHelp and hover to Python autocomplete (#3607)

Corresponds with deephaven/web-client-ui#1178

This addresses the first 3 items in #3453 except deprecation tags.

Adds signatureHelp and hover requests to the Python autocomplete server

Requires you build and force reinstall the Python server locally unless you are using pip -e flag for your local Python server.

Put the plumbing in place for autocomplete cancellation and diagnostic requests

authorization/src/main/java/io/deephaven/auth/codegen/impl/ConsoleServiceAuthWiring.java

@@ -11,6 +11,7 @@
 import io.deephaven.auth.ServiceAuthWiring;
 import io.deephaven.proto.backplane.script.grpc.AutoCompleteRequest;
 import io.deephaven.proto.backplane.script.grpc.BindTableToVariableRequest;
+import io.deephaven.proto.backplane.script.grpc.CancelAutoCompleteRequest;
 import io.deephaven.proto.backplane.script.grpc.CancelCommandRequest;
 import io.deephaven.proto.backplane.script.grpc.ConsoleServiceGrpc;
 import io.deephaven.proto.backplane.script.grpc.ExecuteCommandRequest;
@@ -52,6 +53,8 @@ default ServerServiceDefinition intercept(ConsoleServiceGrpc.ConsoleServiceImplB
         serviceBuilder.addMethod(ServiceAuthWiring.intercept(
                 service, "AutoCompleteStream", this::onCallStartedAutoCompleteStream,
                 this::onMessageReceivedAutoCompleteStream));
+        serviceBuilder.addMethod(ServiceAuthWiring.intercept(
+                service, "CancelAutoComplete", null, this::onMessageReceivedCancelAutoComplete));
         serviceBuilder.addMethod(ServiceAuthWiring.intercept(
                 service, "OpenAutoCompleteStream", null, this::onMessageReceivedOpenAutoCompleteStream));
         serviceBuilder.addMethod(ServiceAuthWiring.intercept(
@@ -141,6 +144,16 @@ void onMessageReceivedBindTableToVariable(AuthContext authContext,
      */
     void onMessageReceivedAutoCompleteStream(AuthContext authContext, AutoCompleteRequest request);
 
+    /**
+     * Authorize a request to CancelAutoComplete.
+     *
+     * @param authContext the authentication context of the request
+     * @param request the request to authorize
+     * @throws io.grpc.StatusRuntimeException if the user is not authorized to invoke CancelAutoComplete
+     */
+    void onMessageReceivedCancelAutoComplete(AuthContext authContext,
+            CancelAutoCompleteRequest request);
+
     /**
      * Authorize a request to OpenAutoCompleteStream.
      *
@@ -187,6 +200,9 @@ public void onCallStartedAutoCompleteStream(AuthContext authContext) {}
         public void onMessageReceivedAutoCompleteStream(AuthContext authContext,
                 AutoCompleteRequest request) {}
 
+        public void onMessageReceivedCancelAutoComplete(AuthContext authContext,
+                CancelAutoCompleteRequest request) {}
+
         public void onMessageReceivedOpenAutoCompleteStream(AuthContext authContext,
                 AutoCompleteRequest request) {}
 
@@ -238,6 +254,11 @@ public void onMessageReceivedAutoCompleteStream(AuthContext authContext,
             ServiceAuthWiring.operationNotAllowed();
         }
 
+        public void onMessageReceivedCancelAutoComplete(AuthContext authContext,
+                CancelAutoCompleteRequest request) {
+            ServiceAuthWiring.operationNotAllowed();
+        }
+
         public void onMessageReceivedOpenAutoCompleteStream(AuthContext authContext,
                 AutoCompleteRequest request) {
             ServiceAuthWiring.operationNotAllowed();
@@ -313,6 +334,13 @@ public void onMessageReceivedAutoCompleteStream(AuthContext authContext,
             }
         }
 
+        public void onMessageReceivedCancelAutoComplete(AuthContext authContext,
+                CancelAutoCompleteRequest request) {
+            if (delegate != null) {
+                delegate.onMessageReceivedCancelAutoComplete(authContext, request);
+            }
+        }
+
         public void onMessageReceivedOpenAutoCompleteStream(AuthContext authContext,
                 AutoCompleteRequest request) {
             if (delegate != null) {