Add support for port create command

[Shilpa-Gokul]

What this PR does / why we need it:
In this PR, a CLI command to create network port is added

Create port

% ./capibmadm powervs port create --network test-subnet --ip-address 192.168.100.34 --description port-desc --service-instance-id aea0ef52-dbb2-4274-87db-ca1fa85381a9 --zone osa21
             
Creating Port  Network ID/Name="test-subnet" IP Address="192.168.100.34" Description="port-desc" service-instance-id="aea0ef52-dbb2-4274-87db-ca1fa85381a9" zone="osa21"
Successfully created a port portID="5cb78d44-2fe7-4924-a643-9124a92b1b87"

DESCRIPTION   EXTERNAL IP   IP ADDRESS       MAC ADDRESS         PORT ID                                STATUS
port-desc                   192.168.100.34   fa:16:3e:4a:66:20   04e011ab-298b-4d2e-9626-ae893d51fc89   DOWN

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 #

Special notes for your reviewer:

/area provider/ibmcloud

1. Please confirm that if this PR changes any image versions, then that's the sole change this PR makes.

Release note:

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: Shilpa-Gokul (96b900a, ab667f5, 771bb1e, 8e2e5f7, e3070a5)

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[k8s-ci-robot]

Welcome @Shilpa-Gokul!

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[k8s-ci-robot]

Hi @Shilpa-Gokul. 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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[Karthik-K-N]

/ok-to-test

[Prajyot-Parab]

@Shilpa-Gokul run go mod tidy on your local that should fix verify check
run make lint on your local to see lint issues and fix them

[Prajyot-Parab]

@Shilpa-Gokul Need to update docs here - Doc ref
For more info, you can refer to Kishen's PR, reach out to me for any queries

[dharaneeshvrd]

#1084
You can rebase this PR once above PR merged since both PR trying to add same type.

[Prajyot-Parab]

/test all

[Karthik-K-N]

Also you may need to rebase the changes.

[Prajyot-Parab]

@Shilpa-Gokul need to rebase the code.

[Karthik-K-N]

Few suggestions otherwise, LGTM

[Karthik-K-N]

/lgtm

[mkumatag]

why is this getting updated?

[Shilpa-Gokul]

@mkumatag It got automatically updated in my local it seems, It works even without these changes, have removed the changes and pushed again. Please review

[mkumatag]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mkumatag, Shilpa-Gokul

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