Fix Cancun Pyspec tests

[jochem-brouwer]

We currently fail Pyspec tests for Cancun, notably: EIP 6780 tests. This PR fixes the problems.

This PR fixes these fixtures: https://github.com/ethereum/execution-spec-tests/releases/tag/v1.0.1

Note: there is a bug in the fixture release, these tests are failing:

    "000-fork=Cancun-one_full_blob_one_tx"
    "001-fork=Cancun-one_full_blob_max_txs"
    "002-fork=Cancun-one_full_blob_at_the_end_max_txs"

This is a bug in the fixtures and is resolved here: ethereum/execution-spec-tests#245

To test, download the fixture release, then unpack into ./packages/ethereum-tests/BlockchainTests (for instance unpack it in the dir "pyspec"). Then in VM:

npm run test:blockchain -- --fork=Cancun --dir=pyspec where pyspec is the dir of the fixtures you just unpacked. (Note: it is also fine to run all Cancun tests, but this will likely run more tests than just the fixtures)

[codecov]

Codecov Report

Merging #2944 (92f5b11) into master (f8605a0) will decrease coverage by 0.04%.
The diff coverage is 73.17%.

Additional details and impacted files

Flag	Coverage Δ
block	88.66% <ø> (ø)
blockchain	92.58% <ø> (ø)
client	87.45% <ø> (ø)
common	98.64% <ø> (ø)
ethash	∅ <ø> (∅)
evm	69.93% <73.17%> (-0.03%)	⬇️
rlp	∅ <ø> (∅)
statemanager	85.16% <ø> (ø)
trie	89.98% <ø> (-0.25%)	⬇️
tx	95.96% <ø> (ø)
util	86.77% <ø> (ø)
vm	79.20% <ø> (ø)

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[acolytec3]

LGTM. Tests all pass (provided by Mario as release fixtures are currently broken)

[g11tech]

lgtm