Use separate constraint position during call substitution as part of inferring postponed type variables

^KT-47052 Fixed
^KT-47082 Fixed

compiler/testData/ir/irText/expressions/kt47082.kt

@@ -0,0 +1,18 @@
+// WITH_RUNTIME
+// !USE_EXPERIMENTAL: kotlin.experimental.ExperimentalTypeInference
+
+import kotlin.experimental.ExperimentalTypeInference
+
+fun <E> produce(@BuilderInference block: Derived<E>.() -> Unit): E = null as E
+
+interface Derived<in E> : Base<E>
+
+interface Base<in E>
+
+interface Receiver<out E>
+
+fun <E, C : Base<E>> Receiver<E>.toChannel(destination: C): C = null as C
+
+fun <R> foo(r: Receiver<R>): R = produce { r.toChannel(this) }
+
+fun box() = "OK"