Azure: Update to latest containers

Soon Azure will be removing the macOS-12 container in following their
normal support schedule. Move us to macOS-14 so we won't have problems
there for a while. At the same time, our Windows container is the oldest
supported, so move to the newer option. Finally, Ubuntu 22.04 is the
middle option currently, but 24.04 should be fine.

Link: https://github.com/actions/runner-images/issues/10721
Signed-off-by: Tom Rini <trini@konsulko.com>
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