Add some issue templates

[astoycos]

Add some issue templates to which is being completed as part of https://github.com/kubernetes-sigs/network-policy-api/pull/119

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: astoycos

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/kubernetes-sigs/network-policy-api/blob/master/OWNERS)~~ [astoycos] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[astoycos]

PTAL @npinaeva

[npinaeva]

/lgtm I will update my PR, and when this one merges we can test the link :)

[k8s-ci-robot]

@npinaeva: changing LGTM is restricted to collaborators

In response to [this](https://github.com/kubernetes-sigs/network-policy-api/pull/120#issuecomment-1609853838): >/lgtm >I will update my PR, and when this one merges we can test the link :) Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository.