The patch removes logic of generating extra IrFiles (fake file) into
IrModuleFragment for the function type interfaces during klib deserialization,
because IC infrastructure can not process files which do not exist in klib.
Instead of adding extra IrFiles during deserialization, the empty files
with required packages are added into Kotlin/JS stdlib physically.
These files are used as containers for function type interface declarations.
Since Kotlin/WASM uses the same klib loading infrastructure as Kotlin/JS,
the the empty files are added into Kotlin/WASM stdlib as well.
The patch also adds a check that IrModuleFagment has files only from klib.
^KT-55720 Fixed
Alexander Korepanov
9324cf3360