feat: switch to stable compiler

[popzxc]

Ports to stable rust.

⚠️ With this PR we no longer compile era-test-node and spawn it in a separate thread; instead we invoke anvil-zksync via alloy-zksync, so the binary must be installed locally to run tests.

[nbaztec]

Given that the era-test-node server was being run in-memory and compiled under dev, and that we're still using other crates of anvil-zksync, I believe we're just slowing down the tests by forking processes during development.
Is there a major speedup that comes with this PR?

[popzxc]

Huh, I didn't expect the test execution time to go 2x. That's unfortunate.
Compiling becomes somewhat faster (since a lot of deps were removed), but not sure if it warrants increased execution time.

I guess then it makes sense to keep using compiled-in version of anvil-zksync.
@dutterbutter maybe we can combine this pr with #810?

[dutterbutter]

@popzxc sounds good. I can re-open #810 and have it ready for review.

[popzxc]

@nbaztec now anvil-zksync is spawned in-memory, the test run time decreased accordingly.

[nbaztec]

Awesome work @popzxc 🎉