Also consider wrapped errors when checking for file IsNotExist errors

Fixes #10534

magefile.go

@@ -268,7 +268,7 @@ func Lint() error {
 	return nil
 }
 
-//  Run go vet linter
+// Run go vet linter
 func Vet() error {
 	if err := sh.Run(goexe, "vet", "./..."); err != nil {
 		return fmt.Errorf("error running go vet: %v", err)