Replace blocking node:fs operations with node:fs/promises

[xayanide]

Describe the feature

This'll be handled soon on refactors involving moduleLoaderUtils

Priority

Low

List the benefits of adding such a feature

To leverage ESM's top level await.
May improve performance? I doubt the gains are significant but my aim here is for it to align more with ESM's

Is this feature request related to a problem?

n/a

[zapteryx]

pre-req: #1370

[zapteryx]

@xayanide are you creating a PR for this?