Update to Kubernetes client 7.6.1

[jonesbusy]

• Upgrade Kubernetes Client 7.6.1
• Do not package anymore snakeyaml-engine (separate API plugin, used also by Jackson3 databind-xml (Add XML module jackson3-api-plugin#36 no consumer yet)
• Require okhttp 5.3.2

https://github.com/fabric8io/kubernetes-client/pull/7377/changes

https://github.com/fabric8io/kubernetes-client/releases/tag/v7.6.1

Testing done

Full bom test jenkinsci/bom#6450

Downstream PR

jenkinsci/kubernetes-credentials-provider-plugin#142
jenkinsci/kubernetes-plugin#2812
jenkinsci/kubernetes-credentials-plugin#92

Submitter checklist

• Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• Ensure that the pull request title represents the desired changelog entry
• Please describe what you did
• Link to relevant issues in GitHub or Jira
• Link to relevant pull requests, esp. upstream and downstream changes
• Ensure you have provided tests that demonstrate the feature works or the issue is fixed

[jonesbusy]

For now

[ERROR] Rule 7: org.apache.maven.enforcer.rules.dependency.RequireUpperBoundDeps failed with message:
[ERROR] Failed while enforcing RequireUpperBoundDeps. The error(s) are [
[ERROR] Require upper bound dependencies error for org.jetbrains.kotlin:kotlin-stdlib:1.9.22. Paths to dependency are:
[ERROR] +-org.jenkins-ci.plugins:kubernetes-client-api:7.6.0-999999-SNAPSHOT
[ERROR]   +-io.jenkins.plugins:okhttp-api:4.12.0-195.vc02552c04ffd
[ERROR]     +-org.jetbrains.kotlin:kotlin-stdlib:1.9.22
[ERROR] and
[ERROR] +-org.jenkins-ci.plugins:kubernetes-client-api:7.6.0-999999-SNAPSHOT
[ERROR]   +-io.fabric8:kubernetes-httpclient-okhttp:7.6.0
[ERROR]     +-com.squareup.okhttp3:okhttp-jvm:5.3.2
[ERROR]       +-org.jetbrains.kotlin:kotlin-stdlib:2.2.21
[ERROR] and
[ERROR] +-org.jenkins-ci.plugins:kubernetes-client-api:7.6.0-999999-SNAPSHOT
[ERROR]   +-io.jenkins.plugins:okhttp-api:4.12.0-195.vc02552c04ffd
[ERROR]     +-org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.9.22
[ERROR]       +-org.jetbrains.kotlin:kotlin-stdlib:1.9.22
[ERROR] and
[ERROR] +-org.jenkins-ci.plugins:kubernetes-client-api:7.6.0-999999-SNAPSHOT
[ERROR]   +-io.jenkins.plugins:okhttp-api:4.12.0-195.vc02552c04ffd
[ERROR]     +-org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.9.22
[ERROR]       +-org.jetbrains.kotlin:kotlin-stdlib:1.9.22
[ERROR] and
[ERROR] +-org.jenkins-ci.plugins:kubernetes-client-api:7.6.0-999999-SNAPSHOT
[ERROR]   +-io.fabric8:kubernetes-httpclient-okhttp:7.6.0
[ERROR]     +-com.squareup.okhttp3:okhttp-jvm:5.3.2
[ERROR]       +-com.squareup.okio:okio-jvm:3.16.4
[ERROR]         +-org.jetbrains.kotlin:kotlin-stdlib:2.2.20

[jonesbusy]

Possible require jenkinsci/okhttp-api-plugin#282