fix: Add logging-logback to gapic-libraries-bom (#13663)

google-cloud-logging-logback was removed from the java-cloud-bom but not
added to other boms managed by libraries-bom. This caused breaking
changes to customers' build. Add it back to gapic-libraries-bom so it is
managed by libraries-bom again.

fixes: googleapis/java-cloud-bom#7498

Author: blakeli0

gapic-libraries-bom/pom.xml

@@ -887,6 +887,11 @@
         <type>pom</type>
         <scope>import</scope>
       </dependency>
+      <dependency>
+        <groupId>com.google.cloud</groupId>
+        <artifactId>google-cloud-logging-logback</artifactId>
+        <version>0.143.0-alpha-SNAPSHOT</version><!-- {x-version-update:google-cloud-logging-logback:current} -->
+      </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-lustre-bom</artifactId>