T8N return an error when asked BLOCKHASH in state test mode

Original issue:
https://github.com/ethereum/execution-specs/issues/1500

here is the evmdump:
http://retesteth.ethdevops.io/temp/pyspecs/frontier__scenarios__test_scenarios__test_blockhash_bug/

error:
```
.venv/lib/python3.12/site-packages/requests/models.py:974: in json
return complexjson.loads(self.text, **kwargs)
/usr/lib/python3.12/json/__init__.py:346: in loads
return _default_decoder.decode(s)
/usr/lib/python3.12/json/decoder.py:337: in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
/usr/lib/python3.12/json/decoder.py:355: in raw_decode
raise JSONDecodeError("Expecting value", s, err.value) from None
E json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

During handling of the above exception, another exception occurred:
tests/frontier/scenarios/test_scenarios.py:257: in test_scenarios
state_test(env=tx_env, pre=pre, post=post, tx=tx, post_hint=hint)
src/pytest_plugins/filler/filler.py:836: in __init__
fixture = self.generate(
src/ethereum_test_specs/state.py:188: in generate
return self.make_state_test_fixture(t8n, fork, eips, self.post_hint)
src/ethereum_test_specs/state.py:139: in make_state_test_fixture
transition_tool_output = t8n.evaluate(
src/ethereum_clis/transition_tool.py:487: in evaluate
return self._evaluate_server(t8n_data=t8n_data, debug_output_path=debug_output_path)
src/ethereum_clis/transition_tool.py:314: in _evaluate_server
output: TransitionToolOutput = TransitionToolOutput.model_validate(response.json())
.venv/lib/python3.12/site-packages/requests/models.py:978: in json
raise RequestsJSONDecodeError(e.msg, e.doc, e.pos)
E requests.exceptions.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
------------------------------------------------------------------------- Captured stderr call --------------------------------------------------------------------------
----------------------------------------
Exception occurred during processing of request from ['local', 0]
Traceback (most recent call last):
File "/usr/lib/python3.12/socketserver.py", line 318, in _handle_request_noblock
self.process_request(request, client_address)
File "/usr/lib/python3.12/socketserver.py", line 349, in process_request
self.finish_request(request, client_address)
File "/home/wins/.cache/ethereum-spec-evm-resolver/Cancun/src/ethereum_spec_tools/evm_tools/daemon.py", line 91, in finish_request
super().finish_request(request, client_address)
File "/usr/lib/python3.12/socketserver.py", line 362, in finish_request
self.RequestHandlerClass(request, client_address, self)
File "/usr/lib/python3.12/socketserver.py", line 761, in __init__
self.handle()
File "/usr/lib/python3.12/http/server.py", line 436, in handle
self.handle_one_request()
File "/usr/lib/python3.12/http/server.py", line 424, in handle_one_request
method()
File "/home/wins/.cache/ethereum-spec-evm-resolver/Cancun/src/ethereum_spec_tools/evm_tools/daemon.py", line 66, in do_POST
main(args=args, out_file=out_wrapper, in_file=input)
File "/home/wins/.cache/ethereum-spec-evm-resolver/Cancun/src/ethereum_spec_tools/evm_tools/__init__.py", line 109, in main
return t8n_tool.run()
^^^^^^^^^^^^^^

```