* txmgr,op-batcher: Improve logging & metrics

- Standardize field names
- Add more fields to tx logging
- Add metrics for basefee and tip cap
- Log frame id and transaction hash together

* txmgr: Remove goroutine use in queue test

Assertions should be made from the main test routine, if possible.
I had local test failures where assertions where made after the main
routine returned already.

Also, the existing test leaked goroutines for transactions that
weren't queued.

A waitgroup can be used here alternatively, but it's cleaner to just
assert in the main routine.