Annotator code for main model and extension model modules should be merged

[manusa]

Description

Currently there are 2 ways that generated model types get annotated (+further generated) depending on their parent module.

For regular/main model modules (those located in kubernetes-model-generator), the annotators defined in kubernetes-model-generator/kubernetes-model-jsonschema2pojo are used.

For extension model modules (those located in extensions), the annotator defined in model-annotator is used.

To prevent issues related to different code generation and for consistency reasons, both annotator modules should be merged and only one should be kept.

Relates to #3433

[stale]

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