Rework our_claim_txn_waiting_first_conf due to aggregate inputs

Due to RBF rules, if an input has been part of an aggregate tx
at first claim try, if we want the bumped tx to land nicely
in the mempool, inputs should be distributed in multiple
bumped tx but still be aggregate in a new bumped tx.

To do so, we track now by txid of claimed tx, cache
per claim tx specific infos and per input specific material.

Author: Antoine Riard