Rename VPC security group types

[dharaneeshvrd]

Remove VPC and resource group field from VPC security group since it is causing by providing an option to pass a different resource than the one used in cluster

What this PR does / why we need it:

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 #1770

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:

Rename VPC security group types and remove VPC and resource group field from VPC security group since it is causing confusion by providing an option to pass a different resource than the one used in cluster

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Amulyam24, dharaneeshvrd, mkumatag

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