Try to migrate E2E tests to Stylus "integration-tests"

[bidzyyys]

Try to migrate some of our E2E tests to check possibility into rewriting them to Stylus integration tests

We need to confirm that everything works:

• Stylus constructors with & without args & errors in constructor
• Asserting events
• Asserting errors
• Possibilities to test precompiles (e.g. ecRecover and future ones)
• Test scenarios with many accounts (at least alice & bob)
• Cross-contract calls
• delegatecall (Proxy)

If everything works, estimate how much time it would take to rewrite all existing E2E tests to integration-tests using AI tools (I believe Claude will do well once it learns from the already migrated examples).