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>