refactor(lsp): inline on_client_exit

runtime/lua/vim/lsp/client.lua

@@ -1252,6 +1252,28 @@ function Client:_on_exit(code, signal)
     end
   end)
 
+  -- Schedule the deletion of the client object so that it exists in the execution of LspDetach
+  -- autocommands
+  vim.schedule(function()
+    all_clients[self.id] = nil
+
+    -- Client can be absent if executable starts, but initialize fails
+    -- init/attach won't have happened
+    if self then
+      changetracking.reset(self)
+    end
+    if code ~= 0 or (signal ~= 0 and signal ~= 15) then
+      local msg = string.format(
+        'Client %s quit with exit code %s and signal %s. Check log for errors: %s',
+        self and self.name or 'unknown',
+        code,
+        signal,
+        lsp.get_log_path()
+      )
+      vim.notify(msg, vim.log.levels.WARN)
+    end
+  end)
+
   self:_run_callbacks(
     self._on_exit_cbs,
     lsp.client_errors.ON_EXIT_CALLBACK_ERROR,