Add support for MacOS runners

[zijchen]

MacOS support was added in June 2022. GitHub actions should also support MacOS as dotnet, sqlpackage, and sqlcmd are all supported on Mac.

[github-actions]

This issue is idle because it has been open for 14 days with no activity.

[zijchen]

It doesn't look like sqlpackage is in the list of pre-installed software on MacOS runners

@dzsquared @chlafreniere We can either request sqlpackage to be added to that list or we can download it at runtime like we do with go-sqlcmd. Thoughts?

[github-actions]

This issue is idle because it has been open for 14 days with no activity.