op-challenger: Fix calculation of bottom game depth

proxyd: adds test case, docs for allowing pre-eip155 txns

fix swapped fee/tip parameters to estimateGas

op-node: Fix race condition closing gossip handler.

txmgr: Fix gas estimation call

- The tip cap and fee cap fields have been mixed up
- Also improve logging

chore: specs typos fixed

Improve test coverage for Position.RelativeToAncestorAtDepth

op-node: Activate Canyon on Mainent & Delta on testnets