Revert "feat(kubectl): Extract interface for KubectlJobExecutor and u…

[DanielaS12]

…se it. (#6076)"

This reverts commit bb04878.

This commit is not needed anymore, for easier way to use and interact with the kubernetes module, this needs to be reverted.

Tested locally, the app runs successfully.

[spinnakerbot]

The following commits need their title changed:

• a6f7df7: Revert "feat(kubectl): Extract interface for KubectlJobExecutor and use it. (feat(kubectl): Extract interface for KubectlJobExecutor and use it. #6076)"

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