Improve tx error without account

[Thoralf-M]

Running https://github.com/iotaledger/iota-sdk/blob/2.0/bindings/nodejs/examples/how_tos/account_output/create.ts without an implicit account or account output before will silently fail in submit_transaction_payload() with Failed to submit_transaction_payload account not found and return a transaction id. It probably shouldn't create the transaction in the first place, but we still need to allow preparing txs when they will be submitted by someone else

[thibault-martinez]

Has been fixed already.