feat: use network policies

[jobcespedes]

Checklist:

• Have you added an explanation of what your changes do and why you'd like them to be included?
• Have you updated or added documentation for the change, as applicable?
• Have you tested your changes on all related environments with successful results, as applicable?

Type of Changes:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

What is the current behavior? (link to any open issues here)

What is the new behavior (if this is a feature change)?

Other information:

[krestomatio-cibot]

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[krestomatio-cibot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
To complete the pull request process, please assign
You can assign the PR to them by writing /assign in a comment when ready.

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

Needs approval from an approver in each of these files:

• OWNERS

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

[jobcespedes]

/test k8s

[jobcespedes]

/test k8s

[krestomatio-cibot]

@jobcespedes: The following tests failed, say /retest to rerun them all:

Test name	Commit	Details	Rerun command
lint	3ef0267	link	/test lint
test	3ef0267	link	/test test
k8s	3ef0267	link	/test k8s

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