Bump Kubernetes-Client to v7.0

[manusa]

Description

Kubernetes Client 7.0.0 was just released: https://github.com/fabric8io/kubernetes-client/releases/tag/v7.0.0

Kubernetes Client 7.0.1 was just released: https://github.com/fabric8io/kubernetes-client/releases/tag/v7.0.1

The new version includes some breaking changes.
Among others, the removal of the (redundant) openshift-server-mock module which has a mirror extension in Quarkus (quarkus-test-openshift-client).
Since the adaptation of Quarkus to the new Kubernetes Client will require changes that will likely impact users in some way, we need to decide in which Quarkus version we'll be able to integrate the version upgrade.

Note that @metacosm has already some work in progress PR #42335
I can probably pick this up next week and have a PR ready for whenever the integration seems suitable.

/cc @metacosm

[quarkus-bot]

/cc @geoand (kubernetes,openshift), @iocanel (kubernetes,openshift)

[geoand]

cc @metacosm

[manusa]

Migration guide content (asciidoc)

== Kubernetes Client (Fabric8)

This release includes the version upgrade for the Fabric8 Kubernetes Client from version 6.13 to version 7.0.

The client is used and exposed by the `quarkus-kubernetes-client` and `quarkus-openshift-client` extensions.
And by the `quarkus-kubernetes` and `quarkus-openshift` extensions, however, for these no changes should be required.

The complete and original upstream migration guide can be found at https://github.com/fabric8io/kubernetes-client/blob/main/doc/MIGRATION-v7.md[fabric8io/kubernetes-client/doc/MIGRATION-v7.md].

With respect to Quarkus, the most important change is the removal of the `io.quarkus:quarkus-test-openshift-client` module.
You should use instead the standard `io.quarkus:quarkus-test-kubernetes-client` which provides the same functionality.
Please check the https://quarkus.io/guides/kubernetes-client#openshift-client[guide] for additional information.

Additionally, some of the model classes have moved to different modules.
Make sure to check the https://github.com/fabric8io/kubernetes-client/blob/main/doc/MIGRATION-v7.md[migration guide] to locate the new module in case a class is no longer found.

/cc @gsmet, @geoand

[gsmet]

Added to the migration guide, thanks!

[gastaldi]

Should we also introduce a migration script in https://github.com/quarkusio/quarkus-updates/blob/main/recipes/src/main/resources/quarkus-updates/core/3.18.yaml?