Removed command to register and deregister the management cluster from TMC

[saji-pivotal]

Removed command to register and deregister the management cluster from TMC. Also removed other TMC references from the CLI code

Signed-off-by: Sudarshan asudarshan@vmware.com

What this PR does / why we need it

TMC is requiring an authenticated URL to fetch the yaml needed to register with TKG clusters. This adds unnecessary complexity to the TKG code. Further TMC has functionality on their side to register with TKG clusters, therefore it is not needed in the TKG code any more.

Which issue(s) this PR fixes

Fixes # #1021

Describe testing done for PR

1. Created a workload cluster successfully to ensure that there are no regressions

Release note

Removes functionality for a TKG cluster to register to TMC using the Tanzu CLI

PR Checklist

• Squash the commits into one or a small number of logical commits
  
• Use good commit messages
• Ensure PR contains terms all contributors can understand and links all contributors can access

Additional information

Special notes for your reviewer

[github-actions]

Cluster Generation A/B Results:
https://storage.googleapis.com/tkg-clustergen/1022/20211029225443/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.

[github-actions]

Cluster Generation A/B Results:
https://storage.googleapis.com/tkg-clustergen/1022/20211101182816/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.

[github-actions]

Cluster Generation A/B Results:
https://storage.googleapis.com/tkg-clustergen/1022/20211101225142/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.

[github-actions]

Cluster Generation A/B Results:
https://storage.googleapis.com/tkg-clustergen/1022/20211102174504/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.

[imikushin]

LGTM