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/extensionResultSubstitution.kt

@@ -0,0 +1,13 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+class A<T> {
+    fun foo() = 1
+}
+
+interface B
+
+public fun <E : B> E.bar() : A<out E> = null!!
+
+fun baz(x: B) {
+    x.bar().foo()
+}