salt.state.zpool tweaks

[sjorge]

What does this PR do?

• improve documentation in regards to creating a striped zpool
• allow the use of the fake vdev type disk

I it is very unlikely that a vdev type with the name disk will ever be added in the underlaying cli tools. For this reason the salt.modules.zpool module does not support the fake vdev type. It seems wise to keep this as close to the actual zpool command as possible.

This vdev type is intentionally not documented, in favor of the correct way of creating such a zpool.

What issues does this PR fix or reference?

#34762

Previous Behavior

n/a

New Behavior

Allow the following states to work:

stripedpoolc:
  zpool.present:
    - config:
        import: false
        force: true
    - properties:
        comment: salty storage pool
    - layout:
        disk-0:
          /tmp/vdisk0
        disk-1:
          /tmp/vdisk1

stripedpoolb:
  zpool.present:
    - config:
        import: false
        force: true
    - properties:
        comment: salty storage pool
    - layout:
        disk-0:
          /tmp/vdisk0
          /tmp/vdisk1

stripedpoola:
  zpool.present:
    - config:
        import: false
        force: true
    - properties:
        comment: salty storage pool
    - layout:
          - /tmp/vdisk0
          - /tmp/vdisk1

Tests written?

No