JVM IR: Avoid direct lambda invokes in inline tests

compiler/testData/codegen/boxInline/anonymousObject/kt13133.kt

@@ -5,11 +5,13 @@
 package test
 
 inline fun inf(crossinline cif: Any.() -> String): () -> String {
-    return {
+    // Approximate the types manually to avoid running into KT-30696
+    val factory: () -> () -> String = {
         object : () -> String {
             override fun invoke() = cif()
         }
-    }()
+    }
+    return factory()
 }
 // FILE: 2.kt