[IR] add testdata for dumpKotlinLike

compiler/testData/ir/irText/expressions/extFunSafeInvoke.kt.txt

@@ -0,0 +1,10 @@
+fun test(receiver: Any?, fn: @ExtensionFunctionType Function3<Any, Int, String, Unit>): Unit? {
+  return { //BLOCK
+    val tmp0_safe_receiver: Any? = receiver
+    when {
+      EQEQ(arg0 = tmp0_safe_receiver, arg1 = null) -> null
+      true -> fn.invoke(p1 = tmp0_safe_receiver, p2 = 42, p3 = "Hello")
+    }
+  }
+}
+