- Add CRD definition
- Add Make targets
- Add CR examples based on ConfigMap example

Signed-off-by: Fred Rolland <frolland@nvidia.com>

Add IPPool controller, watching Pools.
The IP range allocations are available on the CR status.
Node controller triggers event on all Pools when
Node is added/updated/deleted.

Signed-off-by: Fred Rolland <frolland@nvidia.com>

Move from watching Nodes object and read IP range from
annotation, to watch IPPools objects and get Allocations
from their Status.

Signed-off-by: Fred Rolland <frolland@nvidia.com>

In case the IP configuration ConfigMap exists:
- Create IPPools CR according to config spec
- Read Nodes ranges annotation
- Populate the IPpools Status allocations
- Clear Nodes ranges annotation
- Delete ConfigMap

In case an issue is preventing the migration flow,
it can be skipped by setting the env var 'MIGRATOR_DISABLE_MIGRATION'.

Signed-off-by: Fred Rolland <frolland@nvidia.com>

Signed-off-by: Fred Rolland <frolland@nvidia.com>