fix(turbopack-ecmascript): make sure async module wrapper is always generated (#6832)
### Description
The esm check for `EcmascriptModuleContent` was not the same as the
check to add async modules during analysis.
This makes sure both are the same.
Specifically `import *` was not checked and the `SpecifiedModuleType`
(i.e. `.mjs`) was also ignored.
Closes PACK-2170
---------
Co-authored-by: Tobias Koppers <tobias.koppers@googlemail.com>