✨Modify type.go to include shortNames for few Packet CRDs

[bnallapeta]

What this PR does / why we need it:
This PR adds shortNames to several packet CRDs.

Which issue(s) this PR fixes:
Fixes #421.

Local Run:

# kubectl api-resources | grep -i packet
NAME                              SHORTNAMES   APIVERSION                                NAMESPACED   KIND
packetclusters                    pcl          infrastructure.cluster.x-k8s.io/v1beta1   true         PacketCluster
packetmachines                    pma          infrastructure.cluster.x-k8s.io/v1beta1   true         PacketMachine
packetmachinetemplates            pmt          infrastructure.cluster.x-k8s.io/v1beta1   true         PacketMachineTemplate

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: bnallapeta / name: Bharath Nallapeta (1a03ba9)

[k8s-ci-robot]

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[ctreatma]

Nice!

[bnallapeta]

/test all

[k8s-ci-robot]

@bnallapeta: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/test all

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[bnallapeta]

@ctreatma Could you drop in an /ok-to-test label so that it triggers the test suite? Thanks.

[ctreatma]

I think @cprivitere will need to approve the test workflows...I haven't earned anyone's trust yet 🤪

[cprivitere]

/ok-to-test

[cprivitere]

/approve

[cprivitere]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: bnallapeta, cprivitere, ctreatma

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[cprivitere]

/pony

[k8s-ci-robot]

@cprivitere:

In response to this:

/pony

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.

[cprivitere]

/lgtm