[KSP2] Calling getDeclarationsInSourceOrder throws KotlinIllegalStateExceptionWithAttachments

This is another test case in XProcessing. Calling `getDeclarationsInSourceOrder` on a Java class implementing a Kotlin interface throws KotlinIllegalStateExceptionWithAttachments. If the sources are compiled then it works.

Repro: https://github.com/kuanyingchou/ksp/commit/d4962e8ad609b74c0d17ab940d23e0843cab2ea4