txmgr: add more tx metrics

feat(contracts-periphery): update Optimist contract to use OptimistAllowlist

v3.1.0

op-chain-ops: cleanup rollover scripts

discord: update discord invite links

feat(contracts-periphery): create OptimistAllowlist contract

fix(ctb): Do not run slither triage in CI

op-node: remove sync test timeouts for CI

op-node: fix p2p sync client wait group problem

data-transport-layer: better logging around shutoff block

Adds some nice to have logging that makes it much
more obvious that the rollover scripts are working
as intended. Its very important to have good introspection
into what they are doing to be sure that we know
how to solve any problems that may arise.