Adds withAdditionalCustomResourceDefinition(CustomResourceDefinition definition) to
LocallyRunOperatorExtension#Builder. These definitions are applied at the same time
as additionalCustomResourceDefinitions. The definitions are deleted
according to the existing lifecycle.

Why:
In some cases we may wish to apply a CustomResourceDefinition that has
no corresponding CRD file. For example, some frameworks publish
fabric8-based api modules which contain only the java classes and no CRD files.

Signed-off-by: Robert Young <robertyoungnz@gmail.com>