feat: add nativeNodeModules property to output

[eduardoboucas]

- Summary

This PR adds a nativeNodeModules property to the return value of zipFunction and zipFunctions with any native modules detected as part of the logic added in #418. This object has the following shape:

{
  "nativeNodeModules": {
    "module name": {
      "/full/path/to/the/module": "version (e.g. 1.0.0)"
    }
  }
}

With this property, we'll be able to show warnings in the CLI whenever the user is about to locally build and deploy a function with native modules.

Note that this currently only works when building with esbuild. Given that we're making it the new default in less than a month, I'm not sure the effort of adding this detection to the legacy bundler is worth the trouble, but I'm happy to discuss this.

- Test plan

Adjusted existing tests.

- Description for the changelog

- A picture of a cute animal (not mandatory but encouraged)

[github-actions]

⏱ Benchmark results

Comparing with d31d739

• largeDepsEsbuild: 11.4s ⬇️ (0.92% decrease)
• largeDepsZisi: 1m 5.6s ⬇️ (7.27% decrease)

[ehmicky]

👍

Note: CI tests are failing on Node 8

[eduardoboucas]

👍

Note: CI tests are failing on Node 8

Working on that. ⏳