Include call depth in vm.stopAndReturnStateDiff() results

[RPate97]

Component

Forge

Describe the feature you would like

The vm.stopAndReturnStateDiff() cheat code currently returns a flat array of AccountAccess structs with no information on the call depth. This makes it difficult to analyze the results if depth is important for your use case. It would be helpful to add a depth field to the AccountAccess struct to cover this.

Additional context

Since depth is already tracked internally, I would expect this to be relatively easy to implement.