🌱 ipam: add age column to kubectl output

[chrischdi]

What this PR does / why we need it:

This PR adds the AGE column to the output of kubectl for the IPAM resources IPAdressClaim and IPAddress.

Before:

❯ kubectl get ipaddressclaims,ipaddress
NAME                                             POOL NAME   POOL KIND
ipaddressclaim.ipam.cluster.x-k8s.io/foo-claim   foobar      bar

NAME                                     ADDRESS       POOL NAME   POOL KIND
ipaddress.ipam.cluster.x-k8s.io/foo-ip   192.168.0.2   foobar      bar

After:

❯ kubectl get ipaddressclaims,ipaddress
NAME                                             POOL NAME   POOL KIND   AGE
ipaddressclaim.ipam.cluster.x-k8s.io/foo-claim   foobar      bar         101s

NAME                                     ADDRESS       POOL NAME   POOL KIND   AGE
ipaddress.ipam.cluster.x-k8s.io/foo-ip   192.168.0.2   foobar      bar         8s

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

/area ipam

[killianmuldoon]

/lgtm
/approve

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 8c9645ecba301af77ca4ce9befd384b135b16a97

[k8s-ci-robot]

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