[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/tests-gen/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java

@@ -13794,6 +13794,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
             runTest("compiler/testData/codegen/box/delegation/differentModules.kt");
         }
 
+        @TestMetadata("genericFunctionInGenericInterface.kt")
+        public void testGenericFunctionInGenericInterface() throws Exception {
+            runTest("compiler/testData/codegen/box/delegation/genericFunctionInGenericInterface.kt");
+        }
+
         @TestMetadata("genericProperty.kt")
         public void testGenericProperty() throws Exception {
             runTest("compiler/testData/codegen/box/delegation/genericProperty.kt");