[JVM+IR] Migrate/improve receiver mangling test suite

compiler/testData/debug/localVariables/receiverMangling/capturedThisField.kt

@@ -0,0 +1,21 @@
+
+
+// FILE: test.kt
+class Foo {
+    inner class Bar {
+    }
+}
+
+fun box() {
+    val x = Foo()
+    x.Bar()
+}
+
+// LOCAL VARIABLES
+// test.kt:10 box:
+// test.kt:4 <init>:
+// test.kt:10 box:
+// test.kt:11 box: x:Foo=Foo
+// test.kt:5 <init>:
+// test.kt:11 box: x:Foo=Foo
+// test.kt:12 box: x:Foo=Foo