embed KubernetesClient.Models and KubernetesClient.Basic into client sdk

[tg123]

The old proposal that introduced KubernetesClient.Models and KubernetesClient.Basic #793

Why

In order to facilitate support net48. KubernetesClient.Models and KubernetesClient.Basic consistently maintained targeting netstandard2.0. However, the commitment to supporting netstandard2.0 has significantly constrained the KubernetesClient in terms of adopting newer .NET features, such as record models.

One of the core objectives behind introducing the KubernetesClient.Models and KubernetesClient.Basic was to foster third-party engagement, encouraging developers to create custom clients. However, this approach may appear somewhat over-designed, seems no actual adoption of this functionality. Furthermore, even after embedding, third-party clients retain the ability to implement customized client solutions by overriding the AbstractKubernetes.

With the embedding completed, both KubernetesClient and KubernetesClient.Classic can now follow their respective paths for independent development and enhancement.

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (master@80c1315). Click here to learn what that means.
The diff coverage is n/a.

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

@@            Coverage Diff            @@
##             master    #1407   +/-   ##
=========================================
  Coverage          ?   70.32%           
=========================================
  Files             ?       90           
  Lines             ?     2713           
  Branches          ?        0           
=========================================
  Hits              ?     1908           
  Misses            ?      805           
  Partials          ?        0           

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[brendandburns]

Is this a breaking change for users of the library?

Other than that question, looks good to me.

[tg123]

Is this a breaking change for users of the library?

Other than that question, looks good to me.

no breaking change to users depend on KubenetesClient or KubernetesClient.Classic

no new version of Basic and Model anymore

[brendandburns]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: brendandburns, tg123

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [brendandburns,tg123]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment