feat(docs): re-write test gen doc flow with pytest plugin

[danceratopz]

🗒️ Description

This is a rewrite of the automatic test case doc generation as a pytest plugin (as apposed to a standalone script). A preview is available at https://ethereum.github.io/execution-spec-tests/pr-801-preview.

Doc Improvements

1. Test module pages: Added a table that provides and overview of its test functions, e.g., tests/prague/eip2537_bls_12_381_precompiles/test_bls12_g1add.
2. Added test function pages which include a table which tries to give an overview of its parametrized test cases, e.g., tests/prague/eip2537_bls_12_381_precompiles/test_bls12_g1add::test_valid.
3. Added static html files for the tables of the function parameters overview, as they often don't play well within mkdocs styling.
4. Markdown pages: Added a header with a path and ref link for the markdown file, e.g., tests/prague/eip7692_eof_v1/tracker.md

Technical Improvements

1. Doc build fails if no function docstring is available or the test type (e.g. state_test) can not be determined (both used in the function overview tables on test module pages).
2. Using a pytest plugin allows us to lever all the usual pytest flags for test item filtering and fork specification (great for debugging) and to introspect test items to easily grab test metadata.
3. jinja2 is used for templating, which helps separate the content from its formatting. Jinja is a very powerful templating library which helps save a lot of boilerplate code.

🔗 Related Issues

Perhaps solved, plz check whether the styling is acceptable, e.g., test_bls12_g1add/test_valid.html.

• feat(docs): add styling for standalone html table pages #804.

Current issues:

• feat(docs,fw): enable better representations of test parameters in parameter overview tables #803.

Ideas for future improvements:

• feat(forks, docs): allow specification of multiple development forks #802 (not a problem now, but we can only gen docs using one dev fork).
• feat(docs): make it more transparent when a test function is a class method #805.
• fix(docs): move initialization js from jinja2 template to site.js #813.
• feat(docs): make test functions discoverable by full test node id and test function parameter ids #814.
• feat(docs, fw): add a library function that maps a test function id to a (versioned) documentation html page #815.
• docs(bug): function parameter datatables don't switch in dark mode #816.

✅ 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: All converted JSON/YML tests from ethereum/tests have been added to converted-ethereum-tests.txt.
• Tests: A PR with removal of converted JSON/YML tests from ethereum/tests have been opened.
• 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.

[marioevz]

This is absolutely amazing, great PR!
Just some minor comments. Thanks!