Drop @ConfigRoot config classes implementation

[radcortez]

Removes the support of @ConfigRoot with class for Config objects (deprecated since Quarkus 3.19). Config objects must be interfaces annotated with @ConfigMapping and @ConfigRoot to state the phase (recommended for some time now) and documented in the Extension guide: https://quarkus.io/version/3.20/guides/writing-extensions#configuration.

Additionally, this also removes deprecated Config objects kept for compatibility purposes:

• HttpBuildTimeConfig (removed), must use VertxHttpBuildTimeConfig
• HttpConfiguration (removed), must use VertxHttpConfig
• GlobalDevServicesConfig (removed) must use DevServicesConfig

[github-actions]

🎊 PR Preview 25d30a3 has been successfully built and deployed to https://quarkus-pr-main-48717-preview.surge.sh/version/main/guides/

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[gsmet]

The PR is fine but I want us to wait until we branch 3.25 before merging.

[radcortez]

Sure. I've moved it out of draft to have a proper CI build. Sometimes fork builds have issues that don't happen on the main CI.

[gsmet]

@radcortez I just merged 3.25 so we can rebase this one and get it merged. Let's try to merge it as soon as CI is green to prevent conflicts.

[radcortez]

Sure, I'll fix it now.

[quarkus-bot]

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It should be safe to merge provided you have a look at the other checks in the summary.

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[quarkus-bot]

Status for workflow Quarkus CI

This is the status report for running Quarkus CI on commit 96c9b99.

✅ The latest workflow run for the pull request has completed successfully.

It should be safe to merge provided you have a look at the other checks in the summary.

You can consult the Develocity build scans.

[gsmet]

@radcortez Merged! You might want to update the description :).

[gsmet]

@radcortez I had some additional thoughts and I would be in favor of us dropping the deprecated elements from @ConfigRoot.

They are confusing, and now that their support is all gone, I don't think it makes sense to keep them.

People will have a compilation error and maybe we should add a small comment in @ConfigRoot to explain the situation? Something like @ConfigRoot may now be used on interfaces annotated with @ConfigMapping. The prefix and name attributes are gone and @ConfigMapping#prefix maybe be used instead with both attribute values concatenated with a dot.

WDYT?

[radcortez]

Sure. Here it is: #48960