feat: migrate to OTEL and enable metrics by default

google-cloud-bigtable-deps-bom/pom.xml

@@ -77,6 +77,18 @@
         <type>pom</type>
         <scope>import</scope>
       </dependency>
+      <dependency>
+        <groupId>io.opentelemetry</groupId>
+        <artifactId>opentelemetry-bom</artifactId>
+        <version>1.34.1</version>
+        <type>pom</type>
+        <scope>import</scope>
+      </dependency>
+      <dependency>
+        <groupId>com.google.cloud.opentelemetry</groupId>
+        <artifactId>detector-resources-support</artifactId>
+        <version>0.27.0</version>
+      </dependency>
       <!-- Other opencensus packages' versions are pulled through com.google.cloud:third-party-dependencies, but has to be manually specified for this one. -->
       <dependency>
         <groupId>io.opencensus</groupId>