feat(op-chain-ops): use supernode rpc for check-super-root

[stevennevins]

Summary

• switch check-super-root from multi-EL RPC inputs to a single SuperNode RPC input
• simplify the script to fetch verified super roots directly from SuperNode instead of recomputing them
• update the interop action test to cover the supplied-timestamp and latest-finalized flows

Testing

• go test ./op-e2e/actions/interop -run TestSuperRootScript -count=1
• go build ./op-chain-ops/cmd/check-super-root

Metadata

Fixes #19177

[ajsutton]

Ah I think there's some confusion here - we want to keep the check-super-root script accepting multiple EL endpoints. That way you can use providers like Alchemy who won't provide supernode endpoints. I suspect we just need to switch the test over from using supervisor to verify against to supernode.

[stevennevins]

Ah I think there's some confusion here - we want to keep the check-super-root script accepting multiple EL endpoints. That way you can use providers like Alchemy who won't provide supernode endpoints. I suspect we just need to switch the test over from using supervisor to verify against to supernode.

Makes sense, will adjust