http2: add type checks for Http2ServerResponse.end

Refs: nodejs#29829

PR-URL: nodejs#33146
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/parallel/test-http-outgoing-end-types.js

@@ -0,0 +1,18 @@
+'use strict';
+const common = require('../common');
+const assert = require('assert');
+const http = require('http');
+
+const httpServer = http.createServer(common.mustCall(function(req, res) {
+  httpServer.close();
+  assert.throws(() => {
+    res.end(['Throws.']);
+  }, {
+    code: 'ERR_INVALID_ARG_TYPE'
+  });
+  res.end();
+}));
+
+httpServer.listen(0, common.mustCall(function() {
+  http.get({ port: this.address().port });
+}));