CLI publishing failure fixes.

[mitchdenny]

This PR improves the publishing failure UX. There are a couple of improvments.

1. Publisher selection is now using an async call from Spectre console so cancellation is faster.
2. Changed the app host so that if there is a failure during publishing that the app host stops (fixes: Directly running publisher hangs on failure #8549)
3. Removed an erroneous LogError when it should have been a debug message.
4. Fixed TryGetContainerImageName which was also resulting in an erroneous warning/failure message when it actually worked.
5. Reworked the publisher UX so that when publishing fails, the stage in the publishing can be more obvious. This does require some publisher cooperation to catch and log publishing activities but at a minimum we'll get an error at the top level. Fixes:

See video: #8547

aspire-publish-improved-failures.mp4

[Copilot]

Copilot reviewed 6 out of 7 changed files in this pull request and generated 1 comment.

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• playground/publishers/Publishers.AppHost/qots/Dockerfile: Language not supported

[davidfowl]

Can't we use a finally?

[mitchdenny]

/backport to release/9.2

[github-actions]

Started backporting to release/9.2: https://github.com/dotnet/aspire/actions/runs/14276819232