staking miner: Check the queue one last time before submission (#4819)

* staking miner: use config for emergency solution

Fixes #4678

* bump jsonrpsee

* run `monitor_cmd_for` until the connection is closed

* new tokio task for submit_and_watch xt

* re-use header subscription

* update jsonrpsee + simplify code

* revert polkadot runtime changes

* feat: add `ensure_no_better_solution` function

* storage access for submissions and indices

* check ensure_no_previous_solution before remote ext

* fix todos

* grumbles: Perbill::from_percent

* hacky fix

* use modified EPM pallet and various fixes

* diener update --substrate --branch na-epm-pub

* Revert "diener update --substrate --branch na-epm-pub"

This reverts commit b3b9a58c9313372c8f21cf247ba0c8528d9953c0.

* update substrate

* tokio spawn on concurrent stuff

* cleanup

* Update utils/staking-miner/src/monitor.rs

* Update utils/staking-miner/src/monitor.rs

* more cleanup

* fix nits

* address grumbles

* only run batch reqs when signed phase

* better help menu for submission strategy CLI

* add tests for submission strategy