EIP-7702 authorization signature handling in eth_call and eth_estimateGas

[fjl]

Some RPC users would like to simulate EIP-7702 transactions with unsigned set-code authorizations. Since the authorizing address is derived from the signature (r, s, v), they cannot simply provide an address in the call.

To fix this, we need to extend the schema of eth_call and eth_estimateGas so that authorizations have another input field containing the address directly.