Lazily use synthetic apply

Otherwise, as the test tests/init/pos/local-warm5.scala shows,
we may reach an outer that is cold.

Author: liufengyun

compiler/src/dotty/tools/dotc/transform/init/Semantic.scala

@@ -625,13 +625,14 @@ object Semantic {
               given Trace = trace1
               val cls = target.owner.enclosingClass.asClass
               val ddef = target.defTree.asInstanceOf[DefDef]
+              val argErrors = checkArgs
               // normal method call
-              if isSyntheticApply(meth) then
+              if argErrors.nonEmpty && isSyntheticApply(meth) then
                 val klass = meth.owner.companionClass.asClass
                 instantiate(klass, klass.primaryConstructor, args, source)
               else
                 withEnv(if isLocal then env else Env.empty) {
-                  eval(ddef.rhs, ref, cls, cacheResult = true) ++ checkArgs
+                  eval(ddef.rhs, ref, cls, cacheResult = true) ++ argErrors
                 }
             else if ref.canIgnoreMethodCall(target) then
               Result(Hot, Nil)