Dc log mssg

[jayunit100]

Quick logging improvement to clarify the data center connection that is failing and that the vsphere- resolver is talking to V center when it fails at getting k8s vm templates for users to understand the lifecycle and failure modes better when they get errors about

failed to get K8s VM Templates

[github-actions[bot]]

Cluster Generation A/B Results: https://storage.googleapis.com/tkg-clustergen/4469/20230310211357/clustergen.diff.txt Author/reviewers: Please review to verify that the effects on the generated cluster configurations are exactly what the PR intended, and give a thumbs-up if so.