feat: add limited support of comments inside js call.

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/JsCodeOutliningLowering.kt

@@ -163,7 +163,7 @@ private class JsCodeOutlineTransformer(
         }
 
         // Building JS Ast function
-        val lastStatement = jsStatements.last()
+        val lastStatement = jsStatements.findLast { it !is JsSingleLineComment && it !is JsMultiLineComment }
         val newStatements = jsStatements.toMutableList()
         when (lastStatement) {
             is JsReturn -> {

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/JsCallTransformer.kt

@@ -31,14 +31,14 @@ class JsCallTransformer(private val jsOrJsFuncCall: IrCall, private val context:
             0 -> JsEmpty
             1 -> newStatements.single().withSource(jsOrJsFuncCall, context)
             // TODO: use transparent block (e.g. JsCompositeBlock)
-            else -> JsBlock(newStatements)
+            else -> JsGlobalBlock().apply { statements += newStatements }
         }
     }
 
     fun generateExpression(): JsExpression {
         if (statements.isEmpty()) return JsPrefixOperation(JsUnaryOperator.VOID, JsIntLiteral(3)) // TODO: report warning or even error
 
-        val lastStatement = statements.last()
+        val lastStatement = statements.findLast { it !is JsSingleLineComment && it !is JsMultiLineComment }
         val lastExpression = when (lastStatement) {
             is JsReturn -> lastStatement.expression
             is JsExpressionStatement -> lastStatement.expression