[CHECKLIST] ETH2 Light-client re-integration/testing

[drewstone]

Checklist

• [BUG] Fix webb-proposals no_std issue.
• [TASK] Update the pallet-eth2-light-client eth2substrate-block-relay-rs.
• [TASK] Running it inside with Tangle (setting up configuration files)
• [TASK] Update README
• [TASK] (low-priority) Re-implement the eth2substrate-block-relay-rs w/ runtime-apis / RPCs / as a gadget.
• [TASK] Implement retry logic with backoff for async calls #67
• Implement retry client for BeacnRpc Client Simple retry client  #78
• Implement retry client for EthRpc Client Use retry client for eth rpc client #82
• Handle substrate node connection drops (restart the lc-relayer) Reorganise relayer config and add retry logic #76

[drewstone]

#29

[shekohex]

@salman01zp are you the one who is working on this? if so, please assign yourself and remove me from the Assignees.