Updates to the driver.md GST handler

[anvacaru]

This PR makes a few minor updates to the driver.md and gst_to_kore.py test handlers.

1. expectException is an optional key for a block in a General State Test used to highlight an invalid block. This field represents the name of the exception which is expected to be thrown when importing this block to the chain.
   Up until now this key was in the discardedKeys set, but GSTs would still fail final assertions. Changes here are added to check if the status code is an ExceptionalStatusCode when expectException is present, discarding the rest of the checks for the current block.
   Other vm implementations follow the same approach:
   py-evm
   rust-evm

2. Implementation of EIP-3706 which requires the sender of a transaction to be an EOA (externally owned account, without any code deployed).
   For this EIP I added a new rule for loadTx to throw EVMC_FAILURE when the origin of the transaction has deployed code.
   I couldn't find this EIP linked under any hardfork update, however it is present in the Yellowpaper. (under 6. Transaction Execution).

3. Initial checks for balance underflow, depth exceeded, and nonce exceeded were also omitted from the loadTx rules, which caused a number of tests to fail.

4. Changed filter_discard_keys to remove discarded keys from the GST file/fixture recursively.

[Robertorosmaninho]

LGTM, but I would wait for a second approval.
As we had some conflicts on failing.llvm I should ask if this is expected to really remove so many tests of it?

[anvacaru]

Thank you! The conflicts were expected because the previous PR changed failing.llvm.

Most of the tests removed from failing.llvm come from stEIP1559/intrinsic.json and failed because the expectException was not handled.