fix(ext/node): add missing _preloadModules hook (#18447)

This internal node hook is used by libraries such as `ts-node` when used
as a require hook `node -r ts-node/register`. That combination is often
used with test frameworks like `mocha` or `jasmine`.

We had a reference to `Module._preloadModules` in our code, but the
implementation was missing. While fixing this I also noticed that the
`fakeParent` module that we create internally always threw because of
the `pathDirname` check on the module id in the constructor of `Mdoule`.
So this code path was probably broken for a while.

```txt
✖ ERROR: Error: Empty filepath.
    at pathDirname (ext:deno_node/01_require.js:245:11)
    at new Module (ext:deno_node/01_require.js:446:15)
    at Function.Module._resolveFilename (ext:deno_node/01_require.js:754:28)
    at Function.resolve (ext:deno_node/01_require.js:1015:19)
```

0 files changed, 0 insertions, 0 deletions