`setup_program_test` is unhygenic

[segfault-magnet]

Issues ranging from the use of ::rand (i.e. cannot call the macro if you don't have the dep) to assuming fuels types are imported in the macro scope.

::rand (and other deps if applicable) should either be reexported (research risks to semver breaking changes) or any call to them should be delegated to a fn exported in fuels so that the rand dep is hidden behind the fn call.

Make sure to remove rand from the e2e tests Cargo.toml once finished.