Refine member scope for types with projections

Instead of erasing descriptors with conflicting substitution,
use invariant CapturedType(<projection>) as replacement for type parameter
within default member scope.

After substitution leave such types 'as is' everywhere except return types,
use common approximation for them.

 #KT-9294 In Progress
 #KT-5411 Fixed
 #KT-8647 Fixed

 #KT-9462 Fixed
 #KT-9893 Fixed
 #KT-7581 Fixed
 #KT-7296 In Progress

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

@@ -0,0 +1,27 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+interface C<out T>
+interface MC<T> : C<T> {
+    fun addAll(x: C<T>): Boolean
+    fun addAllMC(x: MC<out T>): Boolean
+}
+
+interface Open
+class Derived : Open
+
+fun <T> mc(): MC<T> = null!!
+fun <T> c(): C<T> = null!!
+
+fun foo(x: MC<out Open>) {
+    x.addAll(<!TYPE_MISMATCH(C<kotlin.Nothing>; MC<out Open>)!>x<!>)
+    x.addAllMC(<!TYPE_MISMATCH(MC<kotlin.Nothing>; MC<out Open>)!>x<!>)
+
+    x.addAll(<!TYPE_MISMATCH(C<kotlin.Nothing>; MC<Open>)!>mc<Open>()<!>)
+    x.addAllMC(<!TYPE_MISMATCH(MC<kotlin.Nothing>; MC<Open>)!>mc<Open>()<!>)
+
+    x.addAll(<!TYPE_MISMATCH(C<kotlin.Nothing>; MC<Derived>)!>mc<Derived>()<!>)
+    x.addAllMC(<!TYPE_MISMATCH(MC<kotlin.Nothing>; MC<Derived>)!>mc<Derived>()<!>)
+
+    x.addAll(c())
+    x.addAll(c<Nothing>())
+}