Create testing for storage group management

Storage groups "pool" VGs from different hosts together. This is used to allow the Anvil! to know which LVs to use when provisioning servers / adding disks to servers / protecting servers on DR host(s). All referenced UUIDs are the various volume group internal UUIDs, which are not actual UUIDs annoyingly.

1. Show all VG and SG data;
```
# anvil-manage-storage-groups
Anvil Node: [an-anvil-01] - Demo VM Anvil! Node 1
- Subnode: [an-a01n01] volume groups;
- [an-a01n01_vg0], size: [248.41 GiB], free: [152.68 GiB], internal UUID: [m3Qkdi-ts8I-ZOwG-Dw41-117f-X0fz-g8gI1f]
- Subnode: [an-a01n02] volume groups;
- [an-a01n02_vg0], size: [248.41 GiB], free: [152.68 GiB], internal UUID: [LG8Wib-poB1-ygyo-fVUj-yTks-Mpq4-4qs057]
- Storage group: [Storage group 1], UUID: [34dd8da5-2c79-4e77-b4ba-28258c7defbb]
- [an-a01n01]:[an-a01n01_vg0]
- [an-a01n02]:[an-a01n02_vg0]

Anvil Node: [an-anvil-02] - Demo VM Anvil! Node 2
- Subnode: [an-a02n01] volume groups;
- [an-a02n01_vg0], size: [248.41 GiB], free: [150.54 GiB], internal UUID: [Z5yXC6-Vv02-kxhH-8EJn-ieGZ-2104-CLwxrl]
- Subnode: [an-a02n02] volume groups;
- [an-a02n02_vg0], size: [248.41 GiB], free: [150.54 GiB], internal UUID: [JrZ4ty-PfEM-kqas-QJpv-gToH-FanN-HYSAz0]
- Storage group: [Storage group 1], UUID: [f101fe1b-ba0e-49af-9a57-b6fe45177072]
- [an-a02n01]:[an-a02n01_vg0]
- [an-a02n02]:[an-a02n02_vg0]

Anvil Node: [an-anvil-03] - Demo VM Anvil! Node 3
- Subnode: [an-a03n01] volume groups;
- [an-a03n01_vg0], size: [249.00 GiB], free: [147.20 GiB], internal UUID: [19Sd1Q-HA8B-Z7iy-PsEM-NzgV-t7xb-zvJm5M]
- Subnode: [an-a03n02] volume groups;
- [an-a03n02_vg0], size: [249.00 GiB], free: [147.20 GiB], internal UUID: [10GAjf-E2yA-81kr-d1sV-JerO-Fbbn-ZwtDgV]
- Storage group: [Storage group 1], UUID: [cf606840-d3e2-4f1f-90ff-25bc4b9a8014]
- [an-a03n01]:[an-a03n01_vg0]
- [an-a03n02]:[an-a03n02_vg0]

Disaster Recovery Hosts:
- DR Host: [an-a01dr01] VGs:
- [an-a01dr01_vg0], size: [77.88 GiB], free: [4.00 MiB], internal UUID: [KE03fH-9jp2-szdN-LcnL-fAfw-lG1A-pCqMsC]
- DR Host: [an-a03dr01] VGs:
- [an-a03dr01_vg0], size: [81.80 GiB], free: [4.00 MiB], internal UUID: [Nn4LOd-Mb3P-4cs0-GaVS-AClk-gVsy-U1FxI7]
```

2. Add a VG (using it's internal VG UUID) to an existing SG;
```
# anvil-manage-storage-groups --anvil an-anvil-01 --group "Storage group 1" --add --member KE03fH-9jp2-szdN-LcnL-fAfw-lG1A-pCqMsC
Added the volume group: [an-a01dr01_vg0] on the host: [an-a01dr01] to the storage group: [Storage group 1]. The new member UUID is: [a1f94e96-3022-4bf4-8b39-a644a09c745f].
```

3. Verify;
```
# anvil-manage-storage-groups --anvil an-anvil-01
Anvil Node: [an-anvil-01] - Demo VM Anvil! Node 1
- Subnode: [an-a01n01] volume groups;
- [an-a01n01_vg0], size: [248.41 GiB], free: [152.68 GiB], internal UUID: [m3Qkdi-ts8I-ZOwG-Dw41-117f-X0fz-g8gI1f]
- Subnode: [an-a01n02] volume groups;
- [an-a01n02_vg0], size: [248.41 GiB], free: [152.68 GiB], internal UUID: [LG8Wib-poB1-ygyo-fVUj-yTks-Mpq4-4qs057]
- Storage group: [Storage group 1], UUID: [34dd8da5-2c79-4e77-b4ba-28258c7defbb]
- [an-a01dr01]:[an-a01dr01_vg0]
- [an-a01n01]:[an-a01n01_vg0]
- [an-a01n02]:[an-a01n02_vg0]

Disaster Recovery Hosts:
- DR Host: [an-a01dr01] VGs:
- [an-a01dr01_vg0], size: [77.88 GiB], free: [4.00 MiB], internal UUID: [KE03fH-9jp2-szdN-LcnL-fAfw-lG1A-pCqMsC]
- DR Host: [an-a03dr01] VGs:
- [an-a03dr01_vg0], size: [81.80 GiB], free: [4.00 MiB], internal UUID: [Nn4LOd-Mb3P-4cs0-GaVS-AClk-gVsy-U1FxI7]
```