Migrate all near-sdk-sim-dependent tests to near-workspaces

[frol]

near-sdk-sim was deprecated in favor of near-workspaces, which provides the end-to-end testing framework. I still see a couple of tests that use it: https://github.com/near-daos/sputnik-dao-contract/tree/main/sputnikdao2/tests, even though there are already near-workspaces-js tests there: https://github.com/near-daos/sputnik-dao-contract/tree/main/sputnikdao2/tests-ava

This will unblock upgrading near-sdk-rs to the latest release to enable reproducible builds, ABI support, and cargo-near tooling.