deps: Upgrade the kafka version to 3.8.0 to match the pubsublite-kafk…

…a lib, Upgrade google-cloud-shared-dependencies to 3.30.0 past guava and threeten CVEs

TODO(bcol-google): Update the pubsublite-kafka to the new version once a release is cut from googleapis/java-pubsublite-kafka#482

pom.xml

@@ -22,15 +22,15 @@
     <maven.compiler.source>1.8</maven.compiler.source>
     <maven.compiler.target>1.8</maven.compiler.target>
 
-    <kafka.version>3.4.0</kafka.version>
+    <kafka.version>3.8.0</kafka.version>
   </properties>
 
   <dependencyManagement>
     <dependencies>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-shared-dependencies</artifactId>
-        <version>3.6.0</version>
+        <version>3.20.0</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>