Migrate boxInline tests to new multi-file framework

compiler/testData/codegen/boxInline/anonymousObject/twoCapturedReceivers/kt8668.kt

@@ -0,0 +1,31 @@
+// FILE: 1.kt
+
+package test
+
+class A {
+
+    fun callK(): String {
+        return "K"
+    }
+
+    fun callO(): String {
+        return "O"
+    }
+
+    fun testCall(): String = test { callO() }
+
+    inline fun test(crossinline l: () -> String): String {
+        return {
+            l() + callK()
+        }()
+    }
+}
+
+// FILE: 2.kt
+
+//NO_CHECK_LAMBDA_INLINING
+import test.*
+
+fun box(): String {
+    return A().testCall()
+}