Turbopack: Don't convert script to module when using preset-env (#80724)
Both swc's `preset_env` and the
`crates/next-core/src/next_shared/transforms/next_track_dynamic_imports.rs`
were using the `Program::{Module, Script}` type to determine whether to
insert CJS requires or ESM imports.
Remove the normaliziation of modules to scripts to allow these
transforms to insert the right type of import.