Update core configs plugin yaml + misc improvements

[faisal-chainlink]

Describe your changes

• Use false for Checks flag when calling simulateTransaction for value reads ReadFunction. This dramatically improves the response speeds as it drop checks such as object versions when not necessary.
• Updates keepAlive values for gRPC connections.
• Caches GetCCIPPackageID call and resolves the possible cache poisoning that can happen if the read fails by simply not adding the empty value into the cache.
• Uses the actual index of an event within the transaction instead of a basic count from DB for that event tag.
• Updates the plugins config yaml to include sample config values to be used for JD.