* indexer: use op-bindings for address manager

The `Lib_AddressManager` contract was pulled into
`contracts-bedrock` as a legacy contract and can be
imported into `op-bindings` and build the same way that
the other golang contract bindings are maintained.

This is a legacy contract and should NEVER have any changes to it.
It is ok if it is compiled with a different compiler version for
testing, it will never be deployed to a network to be used with an
Optimism system again. It is very important that the ABI never changes.

Any upgrades to the network that touch this contract first must go
through a `hardhat` or `anvil` forked network to ensure correctness
of the upgrade.

* indexer: go mod tidy + dockerfile
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>