tracker(weld): move `./tests` from EEST to EELS ⚙️🧪⚒️🔥

[danceratopz]

Tracking issue for EEST related tasks necessary for "The Weld": Moving ./tests/ from execution-spec-tests to execution-specs.

Things that need or are still open for discussion are here:

• docs: some ideas on moving ./tests to ethereum/execution-specs #1645

• chore(deps): remove dependency on ethereum-execution #1735

• chore(packaging): make eest a publishable package #1565

• chore(deps): Support pypy3.11 #1840

• refactor(tests): replace absolute imports with relative imports #1844

• execution-specs t8n claims Constantinople is unsupported #266

  • We should try to avoid skipping tests and shouldn't make sure we don't make any complaints about Constantinople with EELS ))

• Improve EEST repo labels; align better with EELS.