chore: skip clirr checks

Author: blakeli0

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

@@ -40,6 +40,8 @@
     <junit.version>5.11.4</junit.version>
     <mockito.version>4.11.0</mockito.version>
     <slf4j.version>2.0.16</slf4j.version>
+    <!--  skipping clirr check for protobuf 4.x upgrade -->
+    <clirr.skip>true</clirr.skip>
   </properties>
 
   <developers>