[element model] migrate do_not_use_environment

Bug: dart-lang/linter#5099
Change-Id: Ided4b129486fd0d394547a69303613db129c66af
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/387625
Commit-Queue: Phil Quitslund <pquitslund@google.com>
Commit-Queue: Brian Wilkerson <brianwilkerson@google.com>
Auto-Submit: Phil Quitslund <pquitslund@google.com>
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>

pkg/linter/lib/src/rules/do_not_use_environment.dart

@@ -36,7 +36,7 @@ class _Visitor extends SimpleAstVisitor {
   @override
   void visitInstanceCreationExpression(InstanceCreationExpression node) {
     var constructorNameNode = node.constructorName;
-    if (constructorNameNode.staticElement?.isFactory != true) {
+    if (constructorNameNode.element?.isFactory != true) {
       return;
     }
     var staticType = node.staticType;