RPC: getConfirmedBlock doesn't include collected rent

[jstarry]

Problem

Rent collection happens when accounts are newly created as well as at epoch boundaries (through eager rent collection). Currently, the rent dues are not included in getConfirmedBlock and so clients have no idea that they were collected (unless they calculate them).

Proposed Solution

Either add (account, rent) to the rewards object (treat as negative rewards) OR add a new object for rent.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.

[CriesofCarrots]

Hey hey, It does now! #17504 and (txs) #17528