Client Rust SDK failed to compile in macOS-12

[henrysun007]

macOS-latest workflows will use macOS-12.

I filed a PR.

I expected to see this happen: All checks are passed.

Instead, this happened: teaclave-client-sdk-macos failed.

I pinned the runner image in #661 to macos-11 and the CI passes.

[henrysun007]

Rust SGX SDK 2.0.0 cannot be compiled on macOS successfully due to intel instructions. Therefore, the client Rust SDK cannot be compiled, either. Tell us if you have needs for macOS.