crane: MacOS Signed binaries

[aaronclong]

Describe the bug

MacOS, since Catalina, has required signed binaries to run. Otherwise, you need to manually exempt the binary to use it.

I know this is quite complicated, but potentially there is a solution to ease this problem.

https://stackoverflow.com/questions/64652704/how-to-notarize-an-macos-command-line-tool-created-outside-of-xcode

https://servicemax.com.au/tips/signing-and-notarising-a-mac-binary-written-in-go/

https://github.molgen.mpg.de/pages/bs/macOSnotes/mac/mac_procs_unsigned.html

To Reproduce

Fresh install on MacOS and attempt to run the binaries from the CLI.

Expected behavior

Be able to download the MacOS binaries and use them directly without exclusion.