txgmr,op-batcher,op-proposer: Migrate transaction creation to the txmgr#5246

trianglesphere merged 3 commits intodevelopethereum-optimism/optimism:developfrom

jg/proposer_craft_tx_in_tx_managerethereum-optimism/optimism:jg/proposer_craft_tx_in_tx_managerCopy head branch name to clipboard