[FIR2IR] Properly calculate the type of delegated function call

```
interface A {
    fun <T> foo(): T
}

class B(val a: A) : A by A {
    generated fun <T'> foo(): T' {
        return a.foo() // <------
    }
}
```

There was a problem that type of generated delegated call used
  an unsubstituted type of the original delegated declaration, which led
  to a situation when (see example) type of call `a.foo()` was not `T'`
  but `T`, which led to incorrect IR and further exceptions on backend

^KT-64257 Fixed
^KT-64284 Obsolete

compiler/testData/codegen/box/delegation/delegationToIntersectionType2.kt

@@ -23,4 +23,4 @@ fun test(c: C, d: D): String {
     return object: A by intersection {}.foo().toString()
 }
 
-fun box() = test(C(), D())
+fun box() = test(C(), D())

compiler/testData/codegen/box/delegation/genericFunctionInGenericInterface.kt

@@ -0,0 +1,15 @@
+// ISSUE: KT-64257
+
+interface Base {
+    fun <R> fold(initial: R, operation: (R, String) -> R): R = operation(initial, "K")
+}
+
+interface Derived<T> : Base
+
+class Impl<T> : Derived<T>
+
+fun box(): String {
+    val impl = Impl<String>()
+    val delegated = object : Derived<String> by impl {}
+    return delegated.fold("O") { a, b -> a + b }
+}

compiler/testData/codegen/box/functions/delegatedPropertyWithMultipleOverriddens_generics.fir.ir.txt

@@ -207,7 +207,7 @@ FILE fqName:<root> fileName:/delegatedPropertyWithMultipleOverriddens_generics.k
       $this: VALUE_PARAMETER name:<this> type:<root>.MC
       BLOCK_BODY
         RETURN type=kotlin.Nothing from='public open fun foo (): kotlin.String declared in <root>.MC'
-          CALL 'public open fun foo (): E6 of <root>.MyArrayList declared in <root>.MyArrayList' type=E6 of <root>.MyArrayList origin=null
+          CALL 'public open fun foo (): E6 of <root>.MyArrayList declared in <root>.MyArrayList' type=kotlin.String origin=null
             $this: GET_FIELD 'FIELD DELEGATE name:$$delegate_0 type:<root>.MyArrayList<kotlin.String> visibility:private [final]' type=<root>.MyArrayList<kotlin.String> origin=null
               receiver: GET_VAR '<this>: <root>.MC declared in <root>.MC.foo' type=<root>.MC origin=null
     PROPERTY DELEGATED_MEMBER name:bar visibility:public modality:OPEN [val]
@@ -220,7 +220,7 @@ FILE fqName:<root> fileName:/delegatedPropertyWithMultipleOverriddens_generics.k
         $this: VALUE_PARAMETER name:<this> type:<root>.MC
         BLOCK_BODY
           RETURN type=kotlin.Nothing from='public open fun <get-bar> (): kotlin.String declared in <root>.MC'
-            CALL 'public open fun <get-bar> (): E6 of <root>.MyArrayList declared in <root>.MyArrayList' type=E6 of <root>.MyArrayList origin=null
+            CALL 'public open fun <get-bar> (): E6 of <root>.MyArrayList declared in <root>.MyArrayList' type=kotlin.String origin=null
               $this: GET_FIELD 'FIELD DELEGATE name:$$delegate_0 type:<root>.MyArrayList<kotlin.String> visibility:private [final]' type=<root>.MyArrayList<kotlin.String> origin=null
                 receiver: GET_VAR '<this>: <root>.MC declared in <root>.MC.<get-bar>' type=<root>.MC origin=null
     FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean [fake_override,operator]