ci (feature): use run-parallel and shared wheel packages for tox

[danceratopz]

🗒️ Description

1. Run tox with run-parallel in Github Actions and pre-commit.
2. Configure tox.ini to use a shared wheel across testenvs instead of individually installing test-filler as a source distribution.

Tricks found in this article https://hynek.me/articles/turbo-charge-tox/.

The speed-up mainly comes from running the docs tox env in parallel to the test env (so you'll never save more time than docs takes) - not sure how much of a tangible impact this will have on Github Actions.

But adding run-parallel to tox is certainly worthwhile locally. This must be done manually (or via pre-commit).

Comparison with Cancun tests (on 69e1d92):

Change	Changes in ./src/	No changes in ./src/
No changes	1m 7s	1m 10s
tox run-parallel	40s	42s
Re-use wheel config	1m 0s	1m 0s
tox run-parallel and re-use wheel config	37s	38s

Comparison in Github Actions

There seems to be such a large variance of running times for "Run Tox Verifications" that these changes will unlikely noticeably impact ci/cd:

🔗 Related Issues

None

✅ Checklist

• All: Set appropriate labels for the changes.
• All: Considered squashing commits to improve commit history.
• All: Added an entry to CHANGELOG.md.
• All: Considered updating the online docs in the ./docs/ directory.
• Tests: Included the type and version of evm t8n tool used to locally execute test cases: e.g., ref with commit hash or geth 1.13.1-stable-3f40e65.
• Tests: Ran mkdocs serve locally and verified the auto-generated docs for new tests in the Test Case Reference are correctly formatted.

[spencer-tb]

Super nice! Blazing fast - LGTM!