Use managed Mach-O signer on non-Mac hosts #45019
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+103
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In dotnet/runtime#108992, we added a managed ad-hoc signer that's used in HostWriter.CreateAppHost. This PR enables it to be used in the sdk when publishing for osx on non-Mac hosts so that developers can distribute an ad-hoc signed binary without using a Mac.
Tests on all platforms ensure that there is a load command with the LC_CODE_SIGNATURE command type in the Mach-O binary. On MacOS, codesign is used to fully validate the signature in addition.