Add proper support for blobs in JSON-RPC methods

[fvictorio]

Our Cancun support with ethereum JS will include partial and dummy support for blobs within the JSON-RPC methods.
This is a placeholder issue for us to track full blob support. This will likely be provided through EDR.

[thedarkjester]

Please can we add proper support for blob submission on the hardhat engine. We want to be able to run tests submitting blobs and be able to execute blobhash(0) to get the submitted blob hash at the index etc.