feat: update kubeconfig logic to use kubconfig, clustername, and context name

[qdzlug]

Is your feature request related to a problem? Please describe.
Currently, we only use the kubeconfig file when running. This works well when there is only one K8 installation defined in the configuration file, but can cause issues if there are multiple clusters and contexts.

Describe the solution you'd like
We should prompt for, validate, and use all three pieces of information when addressing a cluster.

Describe alternatives you've considered
None.

Additional context
None.