fix(compat): don't resolve missing modules to a file with the same name

[merceyz]

What's the problem this PR addresses?

The fix I wrote in #1464 to resolve #897 solved the reported issue but introduced other problems by resolving missing modules to a file with the same name located next to the issuer.

Fixes babel/babel#13140 (comment) (cc @nicolo-ribaudo)

How did you fix it?

When unable to resolve a dependency using PnP use resolve's default logic

Checklist

• I have read the Contributing Guide.
• I have set the packages that need to be released for my changes to be effective.
• I will check that all automated PR checks pass before the PR gets reviewed.