fix: enable java-bigqueryconnect ITSystemTest (#9089)

* fix: enable java-bigqueryconnect ITSystemTest

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

java-bigqueryconnection/README.md

@@ -19,20 +19,20 @@ If you are using Maven, add this to your pom.xml file:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-bigqueryconnection</artifactId>
-  <version>2.11.0</version>
+  <version>2.12.0</version>
 </dependency>
 ```
 
 If you are using Gradle without BOM, add this to your dependencies:
 
 ```Groovy
-implementation 'com.google.cloud:google-cloud-bigqueryconnection:2.11.0'
+implementation 'com.google.cloud:google-cloud-bigqueryconnection:2.12.0'
 ```
 
 If you are using SBT, add this to your dependencies:
 
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-bigqueryconnection" % "2.11.0"
+libraryDependencies += "com.google.cloud" % "google-cloud-bigqueryconnection" % "2.12.0"
 ```
 
 ## Authentication

java-bigqueryconnection/google-cloud-bigqueryconnection/src/test/java/com/google/cloud/bigqueryconnection/v1/it/ITSystemTest.java

@@ -43,11 +43,8 @@
 import org.junit.After;
 import org.junit.Before;
 import org.junit.BeforeClass;
-import org.junit.Ignore;
 import org.junit.Test;
 
-@Ignore(
-    "Excluding this test until the problem is resolved. https://github.com/googleapis/google-cloud-java/issues/9040")
 public class ITSystemTest {
 
   private static final String ID = UUID.randomUUID().toString().substring(0, 8);