```kotlin
interface A {
fun foo() // (1)
}
interface B : A {
// f/o fun foo() // (2)
}
```
In previous commits it was forgotten to create new FIR declarations for
IR fake-overrides, which led to the situation when `IR lazy functions
of `(1)` and `(2)` both contained fir of function (1) as their base
declaration
It seems this change fixed some cases from KT-42020
Dmitriy Novozhilov