Refactor: Ancillary K8s modules should not inherit from KubernetesRawModule

[tima]

[Derived from feedback from @fabianvf]

Ancillary K8s modules such as k8s_service should not inherit from KubernetesRawModule. This is problematic in that the inheritance is too broad and includes a lot of implicitly inherited behavior This makes it unclear what is actually shared and sometimes carries through functions or parameters not applicable to the module being implemented.

Examples of inheritance from the KubernetesRawModule:

• https://github.com/ansible-collections/community.kubernetes/blob/main/plugins/modules/k8s_service.py#L174
• https://github.com/ansible-collections/community.kubernetes/blob/main/plugins/modules/k8s_log.py#L120
• https://github.com/ansible-collections/community.kubernetes/blob/main/plugins/modules/k8s_info.py#L138
• https://github.com/ansible-collections/community.kubernetes/blob/main/plugins/module_utils/scale.py#L44

Which are based on these classes:

• https://github.com/ansible-collections/community.kubernetes/blob/main/plugins/module_utils/common.py#L288
• https://github.com/ansible-collections/community.kubernetes/blob/main/plugins/module_utils/raw.py#L60

These ancillary K8s modules should inherit from AnsibleModule directly rather KubernetesRawModule and use either bare methods in the common.py or if the state is relevant belong in something like the K8sAnsibleMixin (https://github.com/ansible-collections/community.kubernetes/blob/main/plugins/module_utils/common.py#L162), which should not implement AnsibleModule functionality.

Conversely, any broadly useful functions or shared code should be identified and moved out of specific modules and into `common.py.

Related to this, the argspec property should be not be included in K8sAnsibleMixin to avoid similar unintended inheritance with modules where arguments are not relevant.

• Relocate generally applicable functions inherited from KubernetesRawModule to K8sAnsibleMixin or common.py depending on use
• Move any identified broadly useful functions or shared code in specific modules to common.py
• Change inheritance of ancillary k8s modules to use AnsibleModule and apply relocated functions from K8sAnsibleMixin or common.py as necessary.
• Remove argspec property from K8sAnsibleMixin moving to specific argspecs in each module
• Identify any ways the code could be refactored to be "more testable"
• Adjust unit tests as needed to work with refactored code

[Akasurde]

• Refactor module_utils #223
• Replace KubernetesAnsibleModule class with dummy class #227
• Replace KubernetesRawModule class #231

[Akasurde]

All PRs are merged and can be closed.