Introduce High Level MR metrics

[andreub]

What happened?

Shouldn't High Level MR metrics be part of the 1.16 release same as for other official providers?

How can we reproduce it?

Not part of 1.16.0 release

What environment did it happen in?

• Crossplane Version: 1.16.0
• Provider Version: 1.16.0
• Kubernetes Version: not relevant
• Kubernetes Distribution: not relevant

[bobh66]

There is additional work required in the provider to enable metrics - see https://github.com/crossplane-contrib/provider-kubernetes/pull/224 for an example.

[arththebird]

This should be fixed as part of https://github.com/upbound/provider-terraform/pull/277.