add VSphereClusterTemplate to supervisor api group

[aartij17]

What this PR does / why we need it:
This PR adds a VSphereClusterTemplate for the supervisor api group. This is required in the ClusterClass's cluster infrastructureRef.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #1334

Special notes for your reviewer:

Please confirm that if this PR changes any image versions, then that's the sole change this PR makes.

Release note:

NONE

[k8s-ci-robot]

Hi @AartiJivrajani. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[MaxRink]

/ok-to-test

[srm09]

@AartiJivrajani Can you remove the changes from the v1alpha3/v1alpha4 files and rebase the branch with the latest of the main branch?

[aartij17]

/retest

[srm09]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: srm09

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