refactor(kubernetes): refactor Kubernetes provider

[pedrooot]

Description

Refactor code from Kubernetes provider to ensure that it can be used as a library from the SDK.

Checklist

• Are there new checks included in this PR? Yes / No
  • If so, do we need to update permissions for the provider? Please review this carefully.
• [x] Review if the code is being covered by tests.
• [x] Review if code is being documented following this specification https://github.com/google/styleguide/blob/gh-pages/pyguide.md#38-comments-and-docstrings

License

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 38.46154% with 8 lines in your changes missing coverage. Please review.

Project coverage is 89.15%. Comparing base (05da5d1) to head (79a7243). Report is 1 commits behind head on master.

Files	Patch %	Lines
...rowler/providers/kubernetes/kubernetes_provider.py	50.00%	5 Missing :warning:
prowler/providers/common/provider.py	0.00%	3 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #4805 +/- ## ========================================== - Coverage 89.20% 89.15% -0.06% ========================================== Files 933 933 Lines 28567 28567 ========================================== - Hits 25483 25468 -15 - Misses 3084 3099 +15 ```

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