Config Doc - Rewrite xrefs for all config guide

[gsmet]

Note that it also contains some other changes coming from #42677 to reduce further merging hell.

Supersedes #43808 .

@yrodiere please have a look at what's generated as your changes reshuffled the doc and it's a bit hard to make sure this works properly. From what I could see, it seemed OK and the build is fine with the two commits from your PR - but better check things are fine for you.

[github-actions]

🎊 PR Preview 5c3944b has been successfully built and deployed to https://quarkus-pr-main-43943-preview.surge.sh/version/main/guides/

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[quarkus-bot]

Status for workflow Quarkus Documentation CI

This is the status report for running Quarkus Documentation CI on commit 421ea82.

✅ 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.

Warning

There are other workflow runs running, you probably need to wait for their status before merging.

[quarkus-bot]

Status for workflow Quarkus CI

This is the status report for running Quarkus CI on commit 421ea82.

✅ 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.

---

Flaky tests - Develocity

⚙️ JVM Tests - JDK 21

📦 integration-tests/kotlin

✖ io.quarkus.kotlin.maven.it.KotlinRemoteDevModeIT.testThatTheApplicationIsReloadedOnKotlinChange - History

• org.awaitility.core.ConditionTimeoutException: Condition with Lambda expression in io.quarkus.maven.it.RunAndCheckWithAgentMojoTestBase was not fulfilled within 1 minutes. - java.lang.RuntimeException

java.lang.RuntimeException: org.awaitility.core.ConditionTimeoutException: Condition with Lambda expression in io.quarkus.maven.it.RunAndCheckWithAgentMojoTestBase was not fulfilled within 1 minutes.
	at io.quarkus.maven.it.RunAndCheckWithAgentMojoTestBase.runAndCheck(RunAndCheckWithAgentMojoTestBase.java:86)
	at io.quarkus.kotlin.maven.it.KotlinRemoteDevModeIT.testThatTheApplicationIsReloadedOnKotlinChange(KotlinRemoteDevModeIT.java:23)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
Caused by: org.awaitility.core.ConditionTimeoutException: Condition with Lambda expression in io.quarkus.maven.it.RunAndCheckWithAgentMojoTestBase was not fulfilled within 1 minutes.
	at org.awaitility.core.ConditionAwaiter.await(ConditionAwaiter.java:167)

[yrodiere]

I tested locally by rebasing #39416 on this PR, and it works great!

Thanks a lot @gsmet .