fix(consume): fix loading of multi-index, mixed tx type fixtures (#1330)

* fix(consume): fix loading of multi-index mixed tx type fixtures

Test fixtures from ethereum/{tests,legacyTests} can be parametrized by data, gas and value index. In this case, the tx type can be either be an access list type transaction (`0x1`), or not (`0x0`). For the latter, the entry in the transaction `accessList` field is set to `null` (an empty list can also be specified, but then this is a `0x1` type tx). This change handles this case.

* docs: update changelog

* docs: update pr link in changelog

Author: danceratopz

docs/CHANGELOG.md

@@ -32,7 +32,8 @@ consume cache --help
 - ✨ Allow filtering of test cases by fixture format via pytest marks (e.g., `-m blockchain_test`) ([#1314](https://github.com/ethereum/execution-spec-tests/pull/1314)).
 - ✨ Add top-level entries `forks` and `fixture_formats` to the index file that list all the forks and fixture formats used in the indexed fixtures ([#1318](https://github.com/ethereum/execution-spec-tests/pull/1318)).
 - 🐞 Don't parametrize tests for unsupported fixture formats; improve `consume` test collection ([#1315](https://github.com/ethereum/execution-spec-tests/pull/1314)).
-- 🐞 Improve index generation of ethereum/tests fixtures: Allow generation at any directory level and include `generatedTestHash` in the index file for the `fixture_hash` ([#1303](https://github.com/ethereum/execution-spec-tests/pull/1303)).
+- 🐞 Improve index generation of [ethereum/tests](https://github.com/ethereum/tests) fixtures: Allow generation at any directory level and include `generatedTestHash` in the index file for the `fixture_hash` ([#1303](https://github.com/ethereum/execution-spec-tests/pull/1303)).
+- 🐞 Fix loading of [ethereum/tests](https://github.com/ethereum/tests) and [ethereum/legacytests](https://github.com/ethereum/legacytests) fixtures for the case of mixed `0x0` and `0x1` transaction types in multi-index (`data`, `gas`, `value`) state test fixtures ([#1330](https://github.com/ethereum/execution-spec-tests/pull/1330)).
 
 #### `fill`
 

src/ethereum_test_fixtures/state.py

@@ -41,7 +41,7 @@ class FixtureTransaction(TransactionFixtureConverter):
     to: Address | None = None
     value: List[ZeroPaddedHexNumber]
     data: List[Bytes]
-    access_lists: List[List[AccessList]] | None = None
+    access_lists: List[List[AccessList] | None] | None = None
     authorization_list: List[FixtureAuthorizationTuple] | None = None
     max_fee_per_blob_gas: ZeroPaddedHexNumber | None = None
     blob_versioned_hashes: Sequence[Hash] | None = None