function-signature-based caches my be different between files

- if there is only one `import` in a file `importedWrapped` could be inlined, causing difference between `imported` usage and `async-imports`
- if any additional sugar is used in a file - it would not be ported to `async-imports

Solution - `file imports` should be autoexecuted if their `marks` are used. In the same time they should be awaited when their parent marks were used.