EIP-7702 authorization signature handling in eth_call and eth_estimateGas

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.