feat[tool]: add test export infrastructure

[cyberthirst]

What I did

• implement Make the Vyper language test suite consumable #4503

How I did it

How to verify it

Commit message

external tools like vyper-hol and ivy need access to vyper's test suite
to verify their implementations against the reference compiler. this
adds `--export <dir>` to pytest which serializes test execution traces
to JSON files mirroring the test directory structure.

each test export includes:
- contract source, annotated AST, compiler settings, ABI, bytecode
- sequence of deployments and calls with inputs/outputs
- environment state (block info, gas, balances)

fixture dependencies are tracked to ensure traces capture the full setup
sequence needed to reproduce each test.

implementation notes:
- fixture visibility is filtered by pytest scope
  (session/module/function) so consumers know what chain state is
  accessible at each point
- fixtures that don't produce traces (no deployments/calls) are omitted
- execution order is preserved in the timeline, not just the dependency
  graph, since replay order matters for chain state

Description for the changelog

Cute Animal Picture

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.29%. Comparing base (44f3847) to head (0d61eca).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4638      +/-   ##
==========================================
+ Coverage   93.28%   93.29%   +0.01%     
==========================================
  Files         148      148              
  Lines       20561    20579      +18     
  Branches     3570     3572       +2     
==========================================
+ Hits        19180    19199      +19     
  Misses        924      924              
+ Partials      457      456       -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[cyberthirst]

waiting for fix of: paradigmxyz/pyrevm#24

[cyberthirst]

waiting for fix of: paradigmxyz/pyrevm#24

fixed, new release was made - as such i pushed: f3ffd22

[cyberthirst]

sucessfully replayed the latest 10ec93e version in boa and also ivy

[xrchz]

What do we need to do to get this merged?