nit(testing): Move valid_opcodes so merge catches the conflict

[marioevz]

🗒️ Description

Moves valid_opcodes and opcode_gas_map to the same place as eips/amsterdam/eip-8024 so the conflict is caught during merge instead being automatically resolved by adding both versions of both functions to the class.

🔗 Related Issues or PRs

N/A.

✅ Checklist

• All: Ran fast tox checks to avoid unnecessary CI fails, see also Code Standards and Enabling Pre-commit Checks:

  uvx tox -e static

• All: PR title adheres to the repo standard - it will be used as the squash commit message and should start type(scope):.
• All: Considered updating the online docs in the ./docs/ directory.
• All: Set appropriate labels for the changes (only maintainers can apply labels).
• Tests: Ran mkdocs serve locally and verified the auto-generated docs for new tests in the Test Case Reference are correctly formatted.
• Tests: For PRs implementing a missed test case, update the post-mortem document to add an entry the list.
• Ported Tests: All converted JSON/YML tests from ethereum/tests or tests/static have been assigned @ported_from marker.

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[marioevz]

I think we can change the work flow that merges the EIP branches to run static tox flow on the result. That would've caught it.

Edit: #2071

[fselmo]

Ah, makes sense 👍🏼

[fselmo]

I think we can change the work flow that merges the EIP branches to run static tox flow on the result. That would've caught it.

That's a great idea 👌🏼

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (eips/amsterdam/eip-7843@88515e6). Learn more about missing BASE report.

Additional details and impacted files

@@                    Coverage Diff                     @@
##             eips/amsterdam/eip-7843    #2069   +/-   ##
==========================================================
  Coverage                           ?   86.14%           
==========================================================
  Files                              ?      599           
  Lines                              ?    39483           
  Branches                           ?     3781           
==========================================================
  Hits                               ?    34011           
  Misses                             ?     4850           
  Partials                           ?      622           

Flag	Coverage Δ
unittests	86.14% <ø> (?)

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