hardware reservation moving between projects

[t0mk]

This PR adds project_id attribute to hw reservation resource, enabling it to move between projects.

The following workflow is possible:

    - name: fetch hw reservation resource 
      equinix.cloud.metal_hardware_reservation:
        id: "{{ metal_hardware_reservation_id }}"
      register: hwres

    - name: create new project to move the hw res to
      equinix.cloud.metal_project:
        name: "destination-project"
      register: project

    - name: move hw reservation to new project
      equinix.cloud.metal_hardware_reservation:
        id: "{{ metal_hardware_reservation_id }}"
        project_id: "{{ project.id }}"

    - name: move hw reservation to original project
      equinix.cloud.metal_hardware_reservation:
        id: "{{ metal_hardware_reservation_id }}"
        project_id: "{{ hwres.project_id }}"     
   

[displague]

@t0mk looks like this needs a rebase

[t0mk]

@displague rebased