Extraction Engine: Report conflict on all diagnostics from UNRESOLVED_REFERENCE group

#KT-9117 Fixed

idea/testData/refactoring/extractFunction/basic/unresolvedWrongReceiver.kt

@@ -0,0 +1,13 @@
+// SIBLING:
+class A {
+    fun foo() {
+        val a = B()
+        <selection>a.unresolved()</selection>
+    }
+
+    private fun B.unresolved() = 1
+}
+
+class B
+
+private fun A.unresolved() = 1

idea/testData/refactoring/extractFunction/basic/unresolvedWrongReceiver.kt.conflicts

@@ -0,0 +1 @@
+Function A.unresolved will no longer be accessible after extraction