deps: bump com.google.cloud.opentelemetry:exporter-trace

Bumps [com.google.cloud.opentelemetry:exporter-trace](https://github.com/GoogleCloudPlatform/opentelemetry-operations-java) from 0.15.0 to 0.33.0.
- [Release notes](https://github.com/GoogleCloudPlatform/opentelemetry-operations-java/releases)
- [Commits](GoogleCloudPlatform/opentelemetry-operations-java@v0.15.0...v0.33.0)

---
updated-dependencies:
- dependency-name: com.google.cloud.opentelemetry:exporter-trace
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

google-cloud-datastore/pom.xml

@@ -239,7 +239,7 @@
     <dependency>
       <groupId>com.google.cloud.opentelemetry</groupId>
       <artifactId>exporter-trace</artifactId>
-      <version>0.15.0</version>
+      <version>0.33.0</version>
       <scope>test</scope>
     </dependency>
     <dependency>