MacOS sample app not supported due to Github virtulisation limits

Had attempted to add a MacOS sample app in the same style as the windows sample app in https://github.com/grafana/integration-sample-apps/pull/133

However:
1. Github's MacOS runners on Arm64 (Apple Metal) do not have hardware acceleration enabled, and as such cannot run Docker containers, which is necessary for the actual databases. According to the [docs](https://docs.github.com/en/actions/reference/runners/larger-runners#limitations-for-macos-larger-runners), this is only true for "larger" runners, but also applies to `macos-latest`
2. While using `macos-26-intel` is an option (for now, as 26 is the last MacOS version with Intel support) it hangs indefinitely on installing Alloy via homebrew, something I could not replicate locally on actual Mac M1 hardware.

Tl;dr; Shelve this and come back to it in the future if we need it.

_Originally posted by @Dasomeone in https://github.com/grafana/integration-sample-apps/issues/133#issuecomment-4313418812_