fix(dev): Silence ESM-only warning when building for ESM

[ngbrown]

Closes: #6766

When targeting ESM module format (like the default Express template does) with the configuration of serverModuleFormat: "esm", there is no need to warn about ESM-only dependencies for the node server build.

The current warning looks like this:

[warn] esm-only package: browser-bunyan
┃ browser-bunyan is possibly an ESM-only package.
┃ To bundle it with your server, include it in `serverDependenciesToBundle`
┃ -> https://remix.run/docs/en/main/file-conventions/remix-config#serverdependenciestobundle
┗

Testing Strategy:

I tested this change with ESM-only dependencies (quick-lru and browser-bunyan) on the Remix Express template. There is now no warning output and the ESM-only module still works correctly (when removed from serverDependenciesToBundle).

[changeset-bot]

🦋 Changeset detected

Latest commit: fec05f5

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 18 packages

Name	Type
@remix-run/dev	Patch
create-remix	Patch
remix	Patch
@remix-run/architect	Patch
@remix-run/cloudflare	Patch
@remix-run/cloudflare-pages	Patch
@remix-run/cloudflare-workers	Patch
@remix-run/css-bundle	Patch
@remix-run/deno	Patch
@remix-run/eslint-config	Patch
@remix-run/express	Patch
@remix-run/netlify	Patch
@remix-run/node	Patch
@remix-run/react	Patch
@remix-run/serve	Patch
@remix-run/server-runtime	Patch
@remix-run/testing	Patch
@remix-run/vercel	Patch

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[pcattori]

Superceded by #6916