genpolicy is a developer tool that should be usable on MacOS. Adding it
to the darwin CI job ensures that it can still be built after changes.
On an Apple M2, the output of `uname -m` is `arm64`, which is why a new
case is needed in the arch_to_* functions.
We're not going to cross-compile binaries on darwin, so don't install
any additional Rust targets.
Fixes: #11635
Signed-off-by: Markus Rudy <mr@edgeless.systems>
There are a few outstanding changes required to build the runtime on
Darwin.
Let's add a GitHub action to exercise build and unit tests of the
packages which we do expect to work. Eventually this should be dropped
and we can run any Darwin specific tests, or just add MacOS to the
matrix for our static check OSes.
Fixes: #3778
Signed-off-by: Eric Ernst <eric_ernst@apple.com>
