Add custom annotations and labels for ProjectRequests

DevOps are provided with the ability to create namespaces through the self provisioner role, by using `oc new-project <namespace-name>`.

The only way to replicate this declaratively is by creating a `ProjectRequest` resource as below:

kind: ProjectRequest
apiVersion: project.openshift.io/v1
metadata:
  name: foobar

The customer wants to have the ability to pass in custom labels or annotations to this `ProjectRequest` resource, which will in turn be applied to the resultant namespace.

• ProjectRequest [project.openshift.io/v1]
  https://docs.openshift.com/container-platform/4.8/rest_api/project_apis/projectrequest-project-openshift-io-v1.html