KT-11806: increase visibility quick fix, private --> internal, also for members

idea/testData/quickfix/increaseVisibility/privateMemberToInternalSingleFile.kt

@@ -0,0 +1,6 @@
+// "Make x internal" "true"
+class First(private val x: Int)
+
+class Second(f: First) {
+    val y = f.<caret>x
+}