Conan 1.x: Add apple-clang 16 to settings

[chenrui333]

Changelog: Feature: Conan 1.x: Add apple-clang 16 to settings
Docs: conan-io/docs#3837

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similar to:

• Add apple-clang 16 to settings #16972

cc @czoido

[memsharded]

Thanks for the contribution.

Adding new things to Conan 1 settings is a bit more complex, it requires fixing some migration stuff. We can help with that.

However, the release pace of Conan 1.X nowadays is much slower, it might take a while until next Conan 1.X release with this happens.

[chenrui333]

I thought this is more of a settings config change? looks like the patch works for me on the homebrew build/test side.

[ErniGH]

Thanks for your effort! 😄