fix(remix): Use import() to get react-router-dom in Express wrapper. (#5796)

`loadModule` utility which we use to acquire `react-router-dom` can return `null` when called from Express wrapper.

I suspect the main reason is that we are not monkey-patching Remix core here, like we are doing in the base implementation, the package acquisition is not guaranteed to run when (or where?) `react-router-dom` is available.

Author: onurtemizkan

packages/remix/src/utils/serverAdapters/express.ts

@@ -2,7 +2,8 @@ import { getCurrentHub } from '@sentry/hub';
 import { flush } from '@sentry/node';
 import { hasTracingEnabled } from '@sentry/tracing';
 import { Transaction } from '@sentry/types';
-import { extractRequestData, isString, loadModule, logger } from '@sentry/utils';
+import { extractRequestData, isString, logger } from '@sentry/utils';
+import { cwd } from 'process';
 
 import {
   createRoutes,
@@ -18,7 +19,6 @@ import {
   ExpressRequest,
   ExpressRequestHandler,
   ExpressResponse,
-  ReactRouterDomPkg,
   ServerBuild,
 } from '../types';
 
@@ -27,7 +27,8 @@ function wrapExpressRequestHandler(
   build: ServerBuild,
 ): ExpressRequestHandler {
   const routes = createRoutes(build.routes);
-  const pkg = loadModule<ReactRouterDomPkg>('react-router-dom');
+  // eslint-disable-next-line @typescript-eslint/no-var-requires
+  const pkg = require(`${cwd()}/node_modules/react-router-dom`);
 
   // If the core request handler is already wrapped, don't wrap Express handler which uses it.
   if (isRequestHandlerWrapped) {