[release-0.25] Fix incorrect log message when creating management-cluster

[anujc25]

What this PR does / why we need it

• Fix incorrect log message when creating management-cluster
• Instead of using ClusterClass based management cluster config file has been generated should use Management cluster config file has been generated

Which issue(s) this PR fixes

Fixes #

Describe testing done for PR

Release note

Fix incorrect log message when creating management-cluster

Additional information

Special notes for your reviewer

[vuil]

lgtm, thanks.

[github-actions]

Cluster Generation A/B Results:
https://storage.googleapis.com/tkg-clustergen/3172/20220822200307/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.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (release-0.25@72a11ee). Click here to learn what that means.
The diff coverage is n/a.

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