Is your feature request related to a problem? Please describe.

I want to hook into the resolution logic of import('/virtual/path').

Describe the solution you'd like
Make the rollup hook resolveDynamicImport works in dev. It works similar to resolveId hook, but applied to dynamic import

Describe alternatives you've considered
We can also make resolveId apply to dynamic import.

Rollup uses resolveId as fallback of resolveDynamicImport.