Made control-plane NodeBalancer's name dynamic

[julsemaan]

General:

• Have you removed all sensitive information, including but not limited to access keys and passwords?
• Have you checked to ensure there aren't other open or closed Pull Requests for the same bug/feature/question?

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Feature Requests:

• Have you explained your rationale for why this feature is needed?
• Have you offered a proposed implementation/solution?

Currently, the NodeBalancer setup for the control-plane uses a static non-dynamic name which means it can conflict with existing NodeBalancers or will prevent having multiple CAPL clusters with the same name in the same Linode account. Adding a dynamic suffix to the NB label would provide parity with the rest of the resources created by CAPL

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