[macOS] Need to switch from altool to notarytool

[nooges]

altool has been deprecated in favor of notarytool for notarization. Need to find a replacement GitHub action that uses notarytool before November 1, 2023.

Possible replacements that use notarytool:

• https://github.com/lando/code-sign-action
• https://github.com/cocoalibs/xcode-notarization-action

[cakeface]

I'm having a hard time running qmk_toolbox on OSX 14.3 due to code signing. Guessing this^^ is the issue? I'm going to try building from scratch to see if that solves the issue.

[fauxpark]

The Toolbox is not codesigned. It was at one point but this was never released as the GitHub Actions that made it work were deleted, so it was removed.

[TougeAI]

Can this be looked at again? Homebrew now displays a warning that qmk-toolbox will be depreciated 2026-09-01, this is a blanket warning on any cask that fails to pass gatekeeper checks. The alternative according to this comment is to run your own tap. Thanks.