Investigate whether "cancel" transactions should be pushed to state in Transactions Controller as we do with "speed up" transactions

[adonesky1]

Is there some reason we don't add "cancel" transactions into the transactions array like we do with speedup transactions?
cancel:

core/packages/transaction-controller/src/TransactionController.ts

Line 824 in a3b454e

this.hub.emit(`${transactionMeta.id}:finished`, transactionMeta);

speedup:

core/packages/transaction-controller/src/TransactionController.ts

Line 946 in a3b454e

transactions.push(newTransactionMeta);

[ptdatta]

Hey @adonesky1 , Can I work on it??