Revert mac signing change.

[steelhead31]

Temporarily revert pipeline based mac signing change for release

[github-actions]

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[github-actions]

A block has been put on this Pull Request as this repository is temporarily under a code freeze due to an ongoing release cycle.

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[adamfarley]

LGTM

[steelhead31]

/thaw

Pull Request unblocked - code freeze is over.