Allow passing Block Overrides similar to State Overrides in contract reads?

[jwahdatehagh]

eth_call allows for block specific overrides which is handy when simulating calls that e.g. require an environment wither block.basefee is set: https://geth.ethereum.org/docs/interacting-with-geth/rpc/ns-eth#eth-call

imho sensible to allow / enable just like the current stateOverrides options.