IR: do not use lazyWrapper for Ir.Symbols

The reason for switching from lazyWrapper to SymbolTable itself is that
(at least in JS_IR) some of those lazily created structures could later
be deserialized, which created conflicts.

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/JsIrBackendContext.kt

@@ -161,7 +161,7 @@ class JsIrBackendContext(
     fun getOperatorByName(name: Name, type: IrSimpleType) = operatorMap[name]?.get(type.classifier)
 
     override val ir = object : Ir<JsIrBackendContext>(this, irModuleFragment) {
-        override val symbols = object : Symbols<JsIrBackendContext>(this@JsIrBackendContext, symbolTable.lazyWrapper) {
+        override val symbols = object : Symbols<JsIrBackendContext>(this@JsIrBackendContext, symbolTable) {
             override val ThrowNullPointerException =
                 symbolTable.referenceSimpleFunction(getFunctions(kotlinPackageFqn.child(Name.identifier("THROW_NPE"))).single())