Generate unique parameter names in LocalDeclarationsLowering

compiler/testData/codegen/boxInline/innerClasses/captureThisAndOuter.kt

@@ -0,0 +1,11 @@
+// FILE: 1.kt
+inline fun f(g: () -> String) = g()
+
+// FILE: 2.kt
+class A(val x: String) {
+    inner class B(val y: String) {
+        fun h() = f { x + y }
+    }
+}
+
+fun box() = A("O").B("K").h()