New legacy bridge example does not run in global scope

[micaherne]

The recent update to the example legacy bridge code (99eecb6) now runs the legacy script inside a method which breaks the distinction between the two methods of migrating. In particular the main benefit of the legacy bridge over the legacy loader in the text is "since the old script is called in the global variable scope it will reduce side effects on the old code which can sometimes require variables from the global scope". This is no longer the case and it's now difficult to see much benefit of the legacy bridge method.

[javiereguiluz]

Don't know what to say here. Before merging #17524, it was reviewed by the original author of that article (@dbrumann) and it had other strong reviews from @derrabus and @OskarStark.

Do you recommend to revert the entire PR? Tweak some of the new contents? Maybe you can add a comment with the changes that you'd propose. Thanks!

[javiereguiluz]

Let's close this one because we didn't receive more feedback. If you add more information, we'll reopen. Thanks!