Introduce MR metrics

[mergenci]

Description of your changes

Consume crossplane/crossplane-runtime#683 and crossplane/upjet#390.

I have:

• Read and followed Crossplane's contribution process.
• Run make reviewable to ensure this PR is ready for review.
• Added backport release-x.y labels to auto-backport this PR if necessary.

How has this code been tested

I used the following resource configuration and applied testing steps described in crossplane-contrib/provider-upjet-aws#1281.

apiVersion: network.azure.upbound.io/v1beta1
kind: VirtualNetwork
metadata:
  name: test-pr-720-virtualnetwork
spec:
  forProvider:
    addressSpace:
      - 10.0.0.0/16
    location: "Sweden Central"
    resourceGroupName: docs

[mergenci]

/test-examples="examples/network/subnet.yaml"

[mergenci]

/test-examples="examples/network/subnet.yaml"

[ulucinar]

Thanks @mergenci, lgtm.