Show HierarchicalResourceQuota status by kubectl get

[mochizuki875]

What type of PR is this?:

/kind feature

What this PR does / why we need it:

We have added kubectl-hns hrq sub-command to show HierarchicalResourceQuota status in easy way.(#283)
However, it's not yet possible to achive that using the Kubernetes standard way kubectl get hrq.

$ kubectl get hrq -n test
NAME       AGE
test-hrq   80s

So in this PR, I made it possible to show HierarchicalResourceQuota status by using kubectl get hrq.

$ kubectl get hrq -n test
NAME         REQUEST                                              LIMIT
test-hrq     requests.cpu: 500m/1, requests.memory: 100Mi/200Mi   limits.cpu: 500m/2, limits.memory: 100Mi/500Mi
test-hrq-2   requests.memory: 100Mi/300Mi                         limits.cpu: 500m/1

$ kubectl get hrq --all-namespaces
NAMESPACE   NAME         REQUEST                                              LIMIT
test-2      test-hrq-3   requests.cpu: 0/4, requests.memory: 0/500Mi          limits.cpu: 0/8, limits.memory: 0/750Mi
test        test-hrq     requests.cpu: 500m/1, requests.memory: 100Mi/200Mi   limits.cpu: 500m/2, limits.memory: 100Mi/500Mi
test        test-hrq-2   requests.memory: 100Mi/300Mi                         limits.cpu: 500m/1

Tested:

Unit and E2E tests has passed.
I also added test case to HRQ E2E test which is now Pending.

Related:

#274
#283
#289

Special notes for your reviewer:

HierarchicalResourceQuota documentation is proceeding by @zfrhv and @adrianludwin.(#289)
If this PR will be merged to v1.1, we should add this feature to it.

[k8s-ci-robot]

Hi @mochizuki875. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[mochizuki875]

/assign @adrianludwin

[adrianludwin]

Super cool change! At this point, we can save it for v1.2 but I like it :)

Just a few questions before it goes in.

[mochizuki875]

@adrianludwin
OK, I've fixed it.

[rjbez17]

/ok-to-test

This lgtm but I'll let @adrianludwin have final say.

[adrianludwin]

/lgtm
/approve

Thanks for this change!

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: adrianludwin, mochizuki875

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[mochizuki875]

I've fixed conflict.
Could anyone please add /lgtm again?

[adrianludwin]

/lgtm