Add label support to named volumes in docker compose v3 to Kubernetes

[huikaihoo]

1. Add the below labels support to named volumes:

• kompose.volume.selector - Add selector.matchLabels to kubernetes PVC for volume binding
• kompose.volume.size - Change kubernetes supported volume size for docker named volumes

volumes:
  database-vol:
    labels:
      kompose.volume.selector: database-vol-dev
      kompose.volume.size: 500Mi

For example, the above named volume (database-vol) defined in docker compose file will convert to following Kubernetes config

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  creationTimestamp: null
  labels:
    io.kompose.service: database-vol
  name: database-vol
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 200Mi
  selector:
    matchLabels:
      io.kompose.service: database-vol-dev
status: {}

2. Fix the PVC size in log message when deploy Kubernetes

3. Skip creation of PVC if it is already created in the same kubernetes deploy

[k8s-ci-robot]

Thanks for your pull request. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

📝 Please follow instructions at https://git.k8s.io/community/CLA.md#the-contributor-license-agreement to sign the CLA.

It may take a couple minutes for the CLA signature to be fully registered; after that, please reply here with a new comment and we'll verify. Thanks.

---

• If you've already signed a CLA, it's possible we don't have your GitHub username or you're using a different email address. Check your existing CLA data and verify that your email is set on your git commits.
• If you signed the CLA as a corporation, please sign in with your organization's credentials at https://identity.linuxfoundation.org/projects/cncf to be authorized.
• If you have done the above and are still having issues with the CLA being reported as unsigned, please email the CNCF helpdesk: helpdesk@rt.linuxfoundation.org

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository. I understand the commands that are listed here.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
To fully approve this pull request, please assign additional approvers.
We suggest the following additional approver: hangyan

If they are not already assigned, you can assign the PR to them by writing /assign @hangyan in a comment when ready.

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

The pull request process is described 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

[cdrage]

@huikaihoo

Is there any way for you to add tests? If you run into any difficulty I don't mind helping out 👍

[huikaihoo]

I added a test case for the new labels

[cdrage]

Tests pass: https://semaphoreci.com/cdrage/kompose-2

This LGTM!