fix(tests): EIP-7685 - raise InvalidParams for requests shorter than 1 byte

[danceratopz]

Flagged by the reth team.

🗒️ Description

This PR additionally raises EngineAPIError.InvalidParams for the following 2 test cases in the [email protected] release:

tests/prague/eip7685_general_purpose_el_requests/test_request_types.py::test_invalid_request_type[fork_Prague-blockchain_test_engine--no_data-include_valid_requests_True]
tests/prague/eip7685_general_purpose_el_requests/test_request_types.py::test_invalid_request_type[fork_Prague-blockchain_test_engine--no_data-include_valid_requests_False]

These tests have a request of type 0x03 which does not contain data. As such, they are 1 byte in length and according to the API spec:

If any element is out of order, has a length of 1-byte or shorter, or more than one element has the same type byte, client software MUST return -32602: Invalid params error.

the Engine API call should raise EngineAPIError.InvalidParams (they currently do correctly raise a BlockException.INVALID_REQUESTS).

🔗 Related Issues

#1097

✅ Checklist

• All: Set appropriate labels for the changes.
• All: Considered squashing commits to improve commit history.
• All: Added an entry to CHANGELOG.md. skipped But should be added to release notes.

[danceratopz]

I tested client behavior locally with:

1. [email protected]:

• Reth, Geth fail.
• Nethermind pass.

2. This branch:

• Reth, Geth, Nethermind pass.

The fact that Nethermind passed with and without the changes in this PR led to #1139:
3. This branch and #1139:

• Reth, Geth pass
• Nethermind fails.

[marioevz]

I think we should:

• Remove tests/prague/eip7685_general_purpose_el_requests/test_request_types.py altogether, since tests/prague/eip7685_general_purpose_el_requests/test_deposits_withdrawals_consolidations.py::test_invalid_deposit_withdrawal_consolidation_requests already covers most of the cases from that file, and even does it dynamically.
• Add the only extra case from this file to invalid_requests_block_combinations, which is extra invalid type request with data.
• Perhaps rename tests/prague/eip7685_general_purpose_el_requests/test_deposits_withdrawals_consolidations.py to something more generic, since in the future this file will contain tests for newer request types too, but this can be done in a future PR.

I'll open a PR to address these.