Bump fabric8-client.version in /resilience-bench/operator

Bumps `fabric8-client.version` from 6.11.0 to 6.12.1.

Updates `io.fabric8:istio-client` from 6.11.0 to 6.12.1

Updates `io.fabric8:kubernetes-httpclient-vertx` from 6.11.0 to 6.12.1
- [Release notes](https://github.com/fabric8io/kubernetes-client/releases)
- [Changelog](https://github.com/fabric8io/kubernetes-client/blob/main/CHANGELOG.md)
- [Commits](fabric8io/kubernetes-client@v6.11.0...v6.12.1)

Updates `io.fabric8:crd-generator-apt` from 6.11.0 to 6.12.1

---
updated-dependencies:
- dependency-name: io.fabric8:istio-client
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.fabric8:kubernetes-httpclient-vertx
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.fabric8:crd-generator-apt
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

resilience-bench/operator/pom.xml

@@ -15,7 +15,7 @@
         <maven-compiler-plugin.version>3.11.0</maven-compiler-plugin.version>
         <maven-surefire-plugin.version>3.2.5</maven-surefire-plugin.version>
         <jib-maven-plugin.version>3.4.2</jib-maven-plugin.version>
-        <fabric8-client.version>6.11.0</fabric8-client.version>
+        <fabric8-client.version>6.12.1</fabric8-client.version>
         <junit.version>5.10.2</junit.version>
         <spring-boot.version>3.0.6</spring-boot.version>
     </properties>