Proto: Better merging of ticket receipts with same ticket token

Follow-up from !10919 (merged)

For example, when tz1A sends one ticket to KT1A, we will have:

      Ticket updates:
        Ticketer: KT1C
        Content type: string
        Content: "Ticket"
        Account updates:
          tz1A ... -1
        Ticketer: KT1C
        Content type: string
        Content: "Ticket"
        Account updates:
          KT1A ... +1

which is not wrong, but we ideally we should provide:

      Ticket updates:
        Ticketer: KT1C
        Content type: string
        Content: "Ticket"
        Account updates:
          tz1A ... -1
          KT1A ... +1