Propagate the log level to the client

This can be tested by using `--log trace`.  You should see plenty of debug and
trace logs in the console.

Index: code-server/lib/vscode/src/vs/server/node/webClientServer.ts
===================================================================
--- code-server.orig/lib/vscode/src/vs/server/node/webClientServer.ts
+++ code-server/lib/vscode/src/vs/server/node/webClientServer.ts
@@ -285,7 +285,10 @@ export class WebClientServer {
 				remoteAuthority,
 				webviewEndpoint: vscodeBase + '/static/out/vs/workbench/contrib/webview/browser/pre',
 				_wrapWebWorkerExtHostInIframe,
-				developmentOptions: { enableSmokeTestDriver: this._environmentService.driverHandle === 'web' ? true : undefined },
+				developmentOptions: {
+					enableSmokeTestDriver: this._environmentService.driverHandle === 'web' ? true : undefined,
+					logLevel: this._logService.getLevel(),
+				},
 				settingsSyncOptions: !this._environmentService.isBuilt && this._environmentService.args['enable-sync'] ? { enabled: true } : undefined,
 				productConfiguration: <Partial<IProductConfiguration>>{
 					rootEndpoint: base,