contracts-bedrock: deploy time checks

Update .env.example

fix(indexer): return listen error in api

cleanup: delete data-transport-layer

squash me: fix api unused import

feat(op-challenger): Parse Logs

dtl: delete from docker builder

cleanup: delete gas-oracle

chore(packages): Remove legacy `contracts`

The `gas-oracle` service was responsible to managing
the congestion fees of the legacy system. It is no longer
used and can be deleted.

ops: delete legacy ops package

cleanup: delete bss-core

The `ops-bedrock` package will likely be migrated to
the `ops` package. Keep around the dockerfile because the
builds of the `fault-detector` and the `chain-mon` depend
on this dockerfile. We should eventually refactor away this
dockerfile and follow the pattern that the other packages use
where the dockerfile is in the particular package instead of
being outside in its own package.

The `txmgr` was migrated to `op-service` and `bss-core`
is no longer used.

cleanup: delete legacy batch submitter

op-node: TestChannelBankInterleaved

feat: Add example.env

The batch submitter uses `l2geth` as a dep, so
delete the batch submitter first

deps(indexer): Use latest version of go-chi

cleanup: delete l2geth-exporter

feat(ctb): Pull in relevant PoPs work