Fix captured approximation for case of flexible types

#KT-9294 Fixed

compiler/testData/diagnostics/tests/generics/projectionsScope/platformSuperClass.kt

@@ -0,0 +1,22 @@
+// !CHECK_TYPE
+
+// FILE: Clazz.java
+public class Clazz<T> {
+    public T getT() { return null; }
+    public Clazz<? super T> getSuperClass() { return null; }
+}
+
+// FILE: main.kt
+fun test(clazz: Clazz<*>) {
+    clazz.t checkType { _<Any?>() }
+    clazz.getSuperClass() checkType { _<Clazz<*>?>() }
+    clazz.getSuperClass().t checkType { _<Any?>() }
+
+    clazz.superClass checkType { _<Clazz<*>?>() }
+    clazz.superClass.t checkType { _<Any?>() }
+
+    // See KT-9294
+    if (clazz.superClass == null) {
+        throw NullPointerException()
+    }
+}

compiler/testData/diagnostics/tests/generics/projectionsScope/platformSuperClass.txt

@@ -0,0 +1,12 @@
+package
+
+public fun test(/*0*/ clazz: Clazz<*>): kotlin.Unit
+
+public open class Clazz</*0*/ T : kotlin.Any!> {
+    public constructor Clazz</*0*/ T : kotlin.Any!>()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open fun getSuperClass(): Clazz<in T!>!
+    public open fun getT(): T!
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}