Reduce CODE_MOVED error to INFO log.

[kentonv]

This log message indicates a problem with workerd itself, not with the application -- but it's a benign problem that doesn't cause any issues except possibly making crash dumps slightly less useful. This shouldn't be displayed to application developers, since there's nothing they can or should do about it.

Fixes #1472.

[L422Y]

I don't believe this to be entirely benign, at least when using miniflare...
When this error appears, all of my API calls that interact with KV stores also all fail, breaking the application.

[kentonv]

@L422Y It must be correlation, not causation. Again, the table being maintained here is only used to improve crash reports from our production environment.

[L422Y]

I suppose my issue is that without this message, I would have had no idea where the problem was originating, so while I agree that it's probably not what causes the issues, maybe hiding it altogether is more detrimental to developer experience than showing it?

[kentonv]

This message is not telling you anything about where your problem is originating. It seems it is just coincidentally showing up at the same time as some problem you are experiencing. If anything the message is misleading because it makes you think it has something to do with your problem, when it doesn't.

[L422Y]

I think we should consider all use cases - i.e. local development, where the developer can do something about issues with workerd, and they are entirely more likely to occur.

The issue I experienced was distinctly caused by workerd, and in a development environment, it could have been any number of things, and it turned out to be that workerd does not like it when the system it is invoked on goes to sleep.