chore: propagate otel context in Connection API (googleapis#3078)

* chore: propagate otel context in Connection API Use a TaskWrapping executor in the Connection API to propagate the current OpenTelemetry context to the executor thread. This ensures that the context that is used in the end-user application is propagated to the Spanner client library, and tracing shows a full view of the spans from the application to the gRPC layer. * 🦉 Updates from OwlBot post-processor See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md --------- Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: olavloite

README.md

@@ -50,7 +50,7 @@ If you are using Maven without the BOM, add this to your dependencies:
 If you are using Gradle 5.x or later, add this to your dependencies:
 
 ```Groovy
-implementation platform('com.google.cloud:libraries-bom:26.37.0')
+implementation platform('com.google.cloud:libraries-bom:26.38.0')
 
 implementation 'com.google.cloud:google-cloud-spanner'
 ```

google-cloud-spanner/src/main/java/com/google/cloud/spanner/connection/StatementExecutor.java

@@ -28,6 +28,7 @@
 import com.google.common.util.concurrent.ListeningExecutorService;
 import com.google.common.util.concurrent.MoreExecutors;
 import com.google.protobuf.Duration;
+import io.opentelemetry.context.Context;
 import java.util.Collections;
 import java.util.List;
 import java.util.concurrent.Callable;
@@ -147,13 +148,16 @@ org.threeten.bp.Duration asDuration() {
  /** Creates an {@link ExecutorService} for a {@link StatementExecutor}. */
  private static ListeningExecutorService createExecutorService(boolean useVirtualThreads) {
  return MoreExecutors.listeningDecorator(
- new ThreadPoolExecutor(
- 1,
- 1,
- 0L,
- TimeUnit.MILLISECONDS,
- new LinkedBlockingQueue<>(),
- useVirtualThreads ? DEFAULT_VIRTUAL_THREAD_FACTORY : DEFAULT_DAEMON_THREAD_FACTORY));
+ Context.taskWrapping(
+ new ThreadPoolExecutor(
+ 1,
+ 1,
+ 0L,
+ TimeUnit.MILLISECONDS,
+ new LinkedBlockingQueue<>(),
+ useVirtualThreads
+ ? DEFAULT_VIRTUAL_THREAD_FACTORY
+ : DEFAULT_DAEMON_THREAD_FACTORY)));
  }
 
  private final ListeningExecutorService executor;