[JS IR BE] Refactor equals and compareTo lowering

js/js.translator/testData/box/expression/compareTo/booleanCompareTo.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND: JS_IR
 // EXPECTED_REACHABLE_NODES: 1282
 fun box(): String {
     val r1 = trueFun() > falseFun()
@@ -24,4 +23,4 @@ fun box(): String {
 
 fun trueFun() = true
 
-fun falseFun() = false
+fun falseFun() = false