simulators/ethereum/pyspec: Use hive specific fixture format (#844)

* simulators/pyspec: Update to use correct fcuVersion.

* simulators/ethereum/pyspec: Refactor to use new fixture format.

* simulators/ethereum/pyspec: Fix logging, tests links and go.sum.

* simulators/ethereum/pyspec: fixes

* simulators/ethereum/pyspec: update fixtures source

---------

Co-authored-by: Mario Vega <marioevz@gmail.com>

Author: spencer-tb

simulators/ethereum/pyspec/Dockerfile

@@ -21,8 +21,8 @@ COPY --from=builder /source/pyspec/pyspec .
 # To run locally generated fixtures, comment the following RUN lines and
 # uncomment the ADD line.
 # Download the latest fixture release.
-RUN wget https://github.com/ethereum/execution-spec-tests/releases/download/v1.0.3/fixtures.tar.gz
-RUN tar -xzvf fixtures.tar.gz
+RUN wget https://github.com/ethereum/execution-spec-tests/releases/download/v1.0.4/fixtures_hive.tar.gz
+RUN tar -xzvf fixtures_hive.tar.gz
 RUN mv fixtures /fixtures
 
 # ADD ./pyspec/fixtures /fixtures