feat: easy RPC configuration for agents for all chains

[mkykadir]

Description

This PR introduces a new common configuration field rpcUrls which is a string argument expecting list of comma separated RPC URLs. Regardless of chains, any chain RPC URL can be provided in list and while configuration is loaded each RPC will be queried for its chain id so its utilized within related chain configuration.

This makes configuration very easy, especially for automated deployment environments.

Drive-by changes

Configuration loading is now async

Related issues

NA

Backward compatibility

Changes are backward compatible. Common rpcUrls field is optional, when provided URL preferred over chain specific fields so that its easy to configure RPC URLs by default. If common (new) field is not provided RPC URL configuration works as usual.

Testing

Manual, rpcUrls provided and tested

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Latest commit: 12796a7

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[mkykadir]

Docs PR hyperlane-xyz/v3-docs#377

[mkykadir]

updated with latest main

[mkykadir]

closing this that I dont have enough time to keep it updated with recent changes