dumpKotlinLike: add a flag to treat else as true

Deserialized IR always has `true` instead of `else` branch.
Dumping `else` as `true` helps comparing regular and serialized IR.

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/dumpKotlinLike.kt

@@ -58,6 +58,7 @@ class KotlinLikeDumpOptions(
     // TODO support
     val labelPrintingStrategy: LabelPrintingStrategy = LabelPrintingStrategy.NEVER,
     val printFakeOverridesStrategy: FakeOverridesStrategy = FakeOverridesStrategy.ALL,
+    val printElseAsTrue: Boolean = false,
     /*
     TODO add more options:
      always print visibility?
@@ -1244,7 +1245,7 @@ private class KotlinLikeDumper(val p: Printer, val options: KotlinLikeDumpOption
     override fun visitElseBranch(branch: IrElseBranch, data: IrDeclaration?) {
         p.printIndent()
         if ((branch.condition as? IrConst<*>)?.value == true) {
-            p.printWithNoIndent("else")
+            p.printWithNoIndent(if (options.printElseAsTrue) "true" else "else")
         } else {
             p.printWithNoIndent("/* else */ ")
             branch.condition.accept(this, data)