Release op-node, op-batcher, op-proposer v1.0.8

This is a minor release and upgrading is optional.

User Facing Changes

• Environment Variables with the OP_COMPONENT prefix that do not match known flags will be warned about at startup. This will not prevent the node from starting.

🚢 Docker images are available on GCR

What's Changed

• op-stack: Validate prefixed Environment Variables by @trianglesphere in #5625
• feat(op-node): Stub Mainnet Chain Config by @refcell in #5646
• feat(pops): Dispute Game Factory by @refcell in #5650
• feat: Add devxpod as codeowners for various packages by @roninjin10 in #5628
• ci: Fix proxyd build by @mslipper in #5665
• op-node: Add metrics recording the time spent waiting for L1 requests by @ajsutton in #5657
• ci: Release job by @mslipper in #5666
• fix(proxyd): use correct context for auth by @felipe-op in #5654
• message-utils: use BigNumber by @tynes in #5668
• ci: Update tag regex to recognize proxyd by @mslipper in #5667
• Add 4-26 transaction delays post-mortem by @mslipper in #5663
• refactor(proxyd): prevent direct access to backend state struct in consensus poller by @felipe-op in #5664
• fix(proxyd): eth2 block tags {safe, finalized} should be valid tag values and avoid cache by @felipe-op in #5656
• feat(sdk): Update message-utils to mimic MigrateWithdrawalGasLimit by @clabby in #5658
• op-node: Don't invoke p2p unsafe sync for old L2 blocks by @trianglesphere in #5626
• feat(ctb): SafeCall send function to call with zero calldata bytes by @refcell in #5675
• feat(pops): Bond Manager by @refcell in #5649
• feat(migration): Mimic xdm.baseGas in migrate.go by @clabby in #5648
• feat(proxyd): add limit to consensus block lag by @felipe-op in #5652
• feat(proxyd): moar consensus metrics by @felipe-op in #5674
• Use strings package to check for a prefix by @trianglesphere in #5653
• feat(contracts-periphery): create Faucet contract by @tremarkley in #5595
• op-program: Update goerli verification script to handle long safe head stalls by @ajsutton in #5686
• build(deps): bump github.com/docker/distribution from 2.8.1+incompatible to 2.8.2+incompatible by @dependabot in #5691
• fault-detector: contract address override for custom op-chains by @hamdiallam in #5692
• op-program: Remove println by @trianglesphere in #5689
• feat(ctp): add changeset for new faucet contract by @tremarkley in #5688
• fault-detector: add readme for custom op-chains (+ bugfix) by @hamdiallam in #5701
• op-chain-ops: better comments by @tynes in #5699
• Remove unused config for final-migration-rehearsal network by @maurelian in #5700
• fix(op-node): Remove Deprecated Public rpc.Api Field by @refcell in #5712
• feat(proxyd): prevent banning out-of-sync backend by @felipe-op in #5694

Full Changelog: v1.0.7...v1.0.8