llvm-project

b77416ea - [mlir-lsp] Rename `OutgoingNotification` (NFC) (#90076)

[mlir-lsp] Rename `OutgoingNotification` (NFC) (#90076) Rename `OutgoingNotification` to `OutgoingMessage`, since the same callback function type will be used in a future commit to represent outgoing requests, in addition to outgoing notifications.