OpenTelemetryLogHandler - Do not read config for each publish

[gsmet]

This is definitely suboptimal and can lead to infinite loops (if some logging is done in the config layer).

Also made some other micro improvements.

[quarkus-bot]

/cc @brunobat (opentelemetry), @radcortez (opentelemetry)

[brunobat]

Related to #46095

[quarkus-bot]

Status for workflow Quarkus CI

This is the status report for running Quarkus CI on commit 80e4bc6.

✅ 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 17

📦 extensions/micrometer/deployment

✖ io.quarkus.micrometer.deployment.binder.VertxTcpMetricsTest.testTcpMetrics - History

• event executor terminated - java.util.concurrent.RejectedExecutionException

java.util.concurrent.RejectedExecutionException: event executor terminated
	at io.netty.util.concurrent.SingleThreadEventExecutor.reject(SingleThreadEventExecutor.java:934)
	at io.netty.util.concurrent.SingleThreadEventExecutor.offerTask(SingleThreadEventExecutor.java:353)
	at io.netty.util.concurrent.SingleThreadEventExecutor.addTask(SingleThreadEventExecutor.java:346)
	at io.netty.util.concurrent.SingleThreadEventExecutor.execute(SingleThreadEventExecutor.java:836)
	at io.netty.util.concurrent.SingleThreadEventExecutor.execute0(SingleThreadEventExecutor.java:827)
	at io.netty.util.concurrent.SingleThreadEventExecutor.execute(SingleThreadEventExecutor.java:817)
	at io.vertx.core.impl.EventLoopExecutor.execute(EventLoopExecutor.java:35)