Update nix.yml to latest setup-nix-with-cache [WIP]

[enobayram]

PR checklist:

• [ ] Test coverage for the proposed changes
• [ ] PR description contains example output from repl interaction or a snippet from unit test output
• [ ] Documentation has been updated if new natives or FV properties have been added. To generate new documentation, issue cabal run tests. If they pass locally, docs are generated.
• [ ] Any changes that could be relevant to users have been recorded in the changelog
• [ ] In case of changes to the Pact trace output (pact -t), make sure pact-lsp is in sync.

Additionally, please justify why you should or should not do the following:

• [ ] Confirm replay/back compat
• [ ] Benchmark regressions
• [ ] (For Kadena engineers) Run integration-tests against a Chainweb built with this version of Pact

[enobayram]

@emilypi I believe it to be ready code-wise, but we still need to wait for the action run to complete (hopefully with success). Though I think it'll time out a couple of times as it builds and caches layers of Haskell tooling for the first time.

[DevopsGoth]

This workflow has performed under test several times now and should be correct. Merging it will fix current pact build times and provide nix caching for arm64 linux, arm64 mac, and M1 arm macs.