deps: bump opentelemetry.version to 1.52.0 (#3979)

With the [recent upgrade of grpc](#3942), the transitive dependency on `opentelemetry-api` was bumped to 1.52.0 as per grpc/grpc-java@f30964a. In order to prevent upper bound dependency warnings (as in googleapis/java-storage#3381), we update opentelemetry.version to 1.52.0

Author: diegomarquezp

gapic-generator-java-pom-parent/pom.xml

@@ -33,7 +33,7 @@
  <gson.version>2.12.1</gson.version>
  <guava.version>33.5.0-jre</guava.version>
  <protobuf.version>3.25.8</protobuf.version>
- <opentelemetry.version>1.47.0</opentelemetry.version>
+ <opentelemetry.version>1.52.0</opentelemetry.version>
  <errorprone.version>2.42.0</errorprone.version>
  <j2objc-annotations.version>3.1</j2objc-annotations.version>
  <threetenbp.version>1.7.0</threetenbp.version>