Revert "[mlir-lsp] Rename OutgoingNotification (NFC) (#90076)"

This reverts commit b77416e. While that seemed like an
appropriate rename at the time, further review on pull request #90078
makes it unnecessary. This revert changes the name back.

Author: modocache

mlir/include/mlir/Tools/lsp-server-support/Transport.h

@@ -95,10 +95,10 @@ class JSONTransport {
 template <typename T>
 using Callback = llvm::unique_function<void(llvm::Expected<T>)>;
 
-/// An OutgoingMessage<T> is a function used for outgoing requests or
-/// notifications to send to the client.
+/// An OutgoingNotification<T> is a function used for outgoing notifications
+/// send to the client.
 template <typename T>
-using OutgoingMessage = llvm::unique_function<void(const T &)>;
+using OutgoingNotification = llvm::unique_function<void(const T &)>;
 
 /// A handler used to process the incoming transport messages.
 class MessageHandler {
@@ -160,10 +160,9 @@ class MessageHandler {
     };
   }
 
-  /// Create an OutgoingMessage function that, when called, sends a notification
-  /// with the given method via the transport.
+  /// Create an OutgoingNotification object used for the given method.
   template <typename T>
-  OutgoingMessage<T> outgoingNotification(llvm::StringLiteral method) {
+  OutgoingNotification<T> outgoingNotification(llvm::StringLiteral method) {
     return [&, method](const T &params) {
       std::lock_guard<std::mutex> transportLock(transportOutputMutex);
       Logger::info("--> {0}", method);

mlir/lib/Tools/mlir-lsp-server/LSPServer.cpp

@@ -91,7 +91,7 @@ struct LSPServer {
 
   /// An outgoing notification used to send diagnostics to the client when they
   /// are ready to be processed.
-  OutgoingMessage<PublishDiagnosticsParams> publishDiagnostics;
+  OutgoingNotification<PublishDiagnosticsParams> publishDiagnostics;
 
   /// Used to indicate that the 'shutdown' request was received from the
   /// Language Server client.

mlir/lib/Tools/mlir-pdll-lsp-server/LSPServer.cpp

@@ -104,7 +104,7 @@ struct LSPServer {
 
   /// An outgoing notification used to send diagnostics to the client when they
   /// are ready to be processed.
-  OutgoingMessage<PublishDiagnosticsParams> publishDiagnostics;
+  OutgoingNotification<PublishDiagnosticsParams> publishDiagnostics;
 
   /// Used to indicate that the 'shutdown' request was received from the
   /// Language Server client.

mlir/lib/Tools/tblgen-lsp-server/LSPServer.cpp

@@ -72,7 +72,7 @@ struct LSPServer {
 
   /// An outgoing notification used to send diagnostics to the client when they
   /// are ready to be processed.
-  OutgoingMessage<PublishDiagnosticsParams> publishDiagnostics;
+  OutgoingNotification<PublishDiagnosticsParams> publishDiagnostics;
 
   /// Used to indicate that the 'shutdown' request was received from the
   /// Language Server client.