Extra ObjectMeta struct included in CloudStackMachineTemplateResource

[maxdrib]

/kind bug

What steps did you take and what happened:
Create a kind cluster and install CAPC on it. Attempting to serialize a CloudStackMachineTemplate resource and then apply the result to a K8s cluster. This returned the following error:

"error: error validating \"STDIN\": error validating data: unknown object type \"nil\" in CloudStackMachineTemplate.spec.template.metadata.creationTimestamp; if you choose to ignore these errors, turn validation off with --validate=false\n"

It's basically causing the issue described in kubernetes/kubernetes#67610

What did you expect to happen:
I expected to be able to serialize the Go object to bytes, and then apply it with kubectl without having an extra ObjectMeta resource included to worry about. This ObjectMeta does not appear to be used anywhere in CAPC and should be removed. I should not have to set the creationTimestamp field either since as the comment says

	// CreationTimestamp is a timestamp representing the server time when this object was
	// created. It is not guaranteed to be set in happens-before order across separate operations.
	// Clients may not set this value. It is represented in RFC3339 form and is in UTC.

Anything else you would like to add:
This ObjectMeta does not appear to be used anywhere in CAPC and should be removed. However, this would require a new CAPC api version bump

Environment:

• Cluster-api-provider-cloudstack version: main
• Kubernetes version: (use kubectl version): 1.21
• OS (e.g. from /etc/os-release):

[maxdrib]

Resolved by #176