Revert "Ignore tests on big function types until master is 1.3"

This reverts commit f03dc62173.

compiler/testData/codegen/box/functions/bigArity/javaLambda.kt

@@ -1,7 +1,6 @@
 // !LANGUAGE: +FunctionTypesWithBigArity
 // WITH_RUNTIME
 // TARGET_BACKEND: JVM
-// IGNORE_BACKEND: JVM, JVM_IR
 // FILE: J.java
 
 // import kotlin.jvm.functions.Arity;