Drop unused acpeerstates table in a migration, and delete unused keys in housekeeping

- Operating System (Linux/Mac/Windows/iOS/Android): Debian 12
- Core Version: 1.158.0
- Client Version: deltachat-rpc-client 1.158.0

## Expected behavior

Bots have to be able to forget about a contact for privacy reasons. After a contact is removed from all chats, it can be deleted. I'd expect it to be deleted from all database tables.

## Actual behavior

The email address and the public key remain in the acpeerstates table, and maybe also in other database tables (I don't have a good way to check all tables, is there a command for that?)

### Steps to reproduce the problem

1. Create new Alice + Bob profiles
2. Send a message from Bob to Alice
3. In Alice's account, delete the 1:1 chat with Bob
4. In Alice's account the Bob's contact
5. In an sqlitebrowser or similar software, run `select * from acpeerstates;` in Alice's dc.db file