Fix OTel MDC context set

[brunobat]

There are 2 fixes here:

• Make sure we clear the reference for the VertxMDC reference before we add more data there. If we don't do that, that reference will end up being used in multiple threads and be subject to crosstalk.
• When we close the scope, we were restoring previous scopes from spans that were already finished.

Did some refactoring to clarify context objects because we have too many types of contexts.
Added some debug logs for future debugging.

• Fixes: OpenTelemetry: MDC context disappears on ManagedExecutor thread #43134

[quarkus-bot]

/cc @ebullient (micrometer), @radcortez (opentelemetry)

[geoand]

Very nice work!

I only added some trivial comments

[brunobat]

@geoand I was commenting here: #49630 (comment)
And I think I will add a method in VertxMDC to clear the context there to create awareness to this issue.

[geoand]

Great work!

[quarkus-bot]

Status for workflow Quarkus CI

This is the status report for running Quarkus CI on commit 0f0e867.

✅ 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.

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Flaky tests - Develocity

⚙️ JVM Tests - JDK 17

📦 extensions/scheduler/deployment

❌ io.quarkus.scheduler.test.PausedSchedulerTest.testSchedulerPauseResume - History

• expected: <false> but was: <true> - org.opentest4j.AssertionFailedError

Details

org.opentest4j.AssertionFailedError: expected: <false> but was: <true>
	at org.junit.jupiter.api.AssertionFailureBuilder.build(AssertionFailureBuilder.java:158)
	at org.junit.jupiter.api.AssertionFailureBuilder.buildAndThrow(AssertionFailureBuilder.java:139)
	at org.junit.jupiter.api.AssertFalse.failNotFalse(AssertFalse.java:69)
	at org.junit.jupiter.api.AssertFalse.assertFalse(AssertFalse.java:41)
	at org.junit.jupiter.api.AssertFalse.assertFalse(AssertFalse.java:35)
	at org.junit.jupiter.api.Assertions.assertFalse(Assertions.java:246)
	at io.quarkus.scheduler.test.PausedSchedulerTest.testSchedulerPauseResume(PausedSchedulerTest.java:47)

---

⚙️ JVM Tests - JDK 17 Windows

📦 extensions/quartz/deployment

❌ io.quarkus.quartz.test.PausedSchedulerTest.testSchedulerPauseResume - History

• expected: <false> but was: <true> - org.opentest4j.AssertionFailedError

Details

org.opentest4j.AssertionFailedError: expected: <false> but was: <true>
	at org.junit.jupiter.api.AssertionFailureBuilder.build(AssertionFailureBuilder.java:158)
	at org.junit.jupiter.api.AssertionFailureBuilder.buildAndThrow(AssertionFailureBuilder.java:139)
	at org.junit.jupiter.api.AssertFalse.failNotFalse(AssertFalse.java:69)
	at org.junit.jupiter.api.AssertFalse.assertFalse(AssertFalse.java:41)
	at org.junit.jupiter.api.AssertFalse.assertFalse(AssertFalse.java:35)
	at org.junit.jupiter.api.Assertions.assertFalse(Assertions.java:246)
	at io.quarkus.quartz.test.PausedSchedulerTest.testSchedulerPauseResume(PausedSchedulerTest.java:47)

---

⚙️ Gradle Tests - JDK 17 Windows

📦 integration-tests/gradle

❌ io.quarkus.gradle.BasicMultiModuleQuarkusBuildTest.testBasicMultiModuleBuild - History

• `
  Expecting actual:
  "Downloading https://services.gradle.org/distributions/gradle-8.14-bin.zip

Exception in thread "main" java.io.IOException: Downloading from https://services.gradle.org/distributions/gradle-8.14-bin.zip failed: timeout (10000ms)-java.lang.AssertionError`

Details

java.lang.AssertionError: 

Expecting actual:
  "Downloading https://services.gradle.org/distributions/gradle-8.14-bin.zip

Exception in thread "main" java.io.IOException: Downloading from https://services.gradle.org/distributions/gradle-8.14-bin.zip failed: timeout (10000ms)
	at org.gradle.wrapper.Install.forceFetch(SourceFile:4)
	at org.gradle.wrapper.Install$1.call(SourceFile:8)

❌ io.quarkus.gradle.devmode.KotlinProjectWithCompilerArgsDevModeTest.main - History

• Condition with Lambda expression in io.quarkus.test.devmode.util.DevModeClient was not fulfilled within 2 minutes. - org.awaitility.core.ConditionTimeoutException

Details

org.awaitility.core.ConditionTimeoutException: Condition with Lambda expression in io.quarkus.test.devmode.util.DevModeClient was not fulfilled within 2 minutes.
	at org.awaitility.core.ConditionAwaiter.await(ConditionAwaiter.java:167)
	at org.awaitility.core.CallableCondition.await(CallableCondition.java:78)
	at org.awaitility.core.CallableCondition.await(CallableCondition.java:26)
	at org.awaitility.core.ConditionFactory.until(ConditionFactory.java:1160)
	at org.awaitility.core.ConditionFactory.until(ConditionFactory.java:1129)
	at io.quarkus.test.devmode.util.DevModeClient.getHttpResponse(DevModeClient.java:164)
	at io.quarkus.gradle.devmode.QuarkusDevGradleTestBase.getHttpResponse(QuarkusDevGradleTestBase.java:165)

[brunobat]

Failures seem unrelated. Will merge.

[brunobat]

@gsmet We should consider this to backport, if possible.