Refactor: utils.getRuleInfo

[fisker]

Make it accept object contains ast and optional scopeManager, so we can simply just pass sourceCode to it. I believe this will fix some reference searching.

[aladdin-add]

just to confirm: sourceCode contains more than ast and scopeManager, but other properties will not be used?

I feel a little hesitate to pass the unused properties - it could be confusing. :)

[fisker]

just to confirm: sourceCode contains more than ast and scopeManager, but other properties will not be used?

Yes. But accessing sourceCode is cheap, almost every rule need access to it.