test: mock-upstream-provider to replace alchemy in testing (fails intermittently)

[sabotagebeats]

mock-upstream-provider. We can just statically feed the state this way, no HTTP required

• What you are trying to do
  use tests that rely on alchemy in ape
• Why Ape's current functionality is inadequate to address your goal
  alchemy fails intermittently when testing

[antazoey]

I think after this exists: ApeWorX/ape#680, we can create a .db full of data for mainnet-fork and then include that file in the tests and run with that latest block number as the arg.

Then, it does not need to rely on Alchemy so much and we focus on the plugin.
I think we also need to chat with Alchemy about this.