Sign MacOS Binaries with JFrog Certificate

[EyalDelarea]

• All tests have passed. If this feature is not already covered by the tests, new tests have been added.
• The pull request is targeting the dev branch.
• The code has been validated to compile successfully by running go vet ./....
• The code has been formatted properly using go fmt ./....

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Sign Darwin Binaries during Release

This PR introduce a way to integrate darwin signed executables singing during the CLI release.

Darwin Release Flow:

flowchart TD

    A[Bump Version Commit to v2 branch Triggers the flow] --> B[GitHub Actions Build & Upload Signed darwin exeutables] --> C(Jenkins Job does not build darwin exeutables - downloads from github packages)
    
    C --> E
    
   E[Distribute to releases]
    

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Example workflow runs:

• Not skipped : https://github.com/EyalDelarea/jfrog-cli/actions/runs/9368072528
• Skipped : https://github.com/EyalDelarea/jfrog-cli/actions/runs/9368666911

TODO:

• Test Jenkins script
• GitHub Token is needed for the Action to delete old artifacts ( to avoid overhead )
• Add apple secrets to repository

[EyalDelarea]

This is still a work in progress, i'm not sure if the executable name is important for the rest of the release or not.