There is now an open source cross-platform code signing and notarizing tool that works on Linux. https://gregoryszorc.com/blog/2022/08/08/achieving-a-completely-open-source-implementation-of-apple-code-signing-and-notarization/

Removing the three release jobs in favor of a single job should yield massive performance increases. Most of the release build time is taken up by uploading artifacts for use in the next job.

Success criteria:

• No darwin runners are used during the release/build process except for cross-platform testing
• Darwin binaries are built on linux, signed on linux and notarized on linux
• Release build becomes a single job instead of a linux job, a darwin job and a final linux publish job

cc @kylecarbs