fix(RAWVDI): define vdi_type for RAWVDI (#151)

Add `vdi_type` as `phy` for `drivers/LUNperVDI.py:RAWVDI.load()`.
If we don't define a vdi_type, the VDI activation in blktap2.py will fail with error:
```
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread] ***** generic exception: vdi_attach: EXCEPTION <class 'blktap2.VDI.UnexpectedVDIType'>, Target <class '__ma
in__.ISCSIVDI'> has unexpected VDI type ''
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]   File "/opt/xensource/sm/SRCommand.py", line 113, in run
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]     return self._run_locked(sr)
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]   File "/opt/xensource/sm/SRCommand.py", line 163, in _run_locked
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]     rv = self._run(sr, target)
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]   File "/opt/xensource/sm/SRCommand.py", line 260, in _run
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]     writable, caching_params=caching_params)
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]   File "/opt/xensource/sm/blktap2.py", line 1616, in attach
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]     {"rdonly": not writable})
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]   File "/opt/xensource/sm/blktap2.py", line 1854, in _activate
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]     if self.tap_wanted():
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]   File "/opt/xensource/sm/blktap2.py", line 1154, in tap_wanted
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]     vdi_type = self.target.get_vdi_type()
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]   File "/opt/xensource/sm/blktap2.py", line 1207, in get_vdi_type
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]     raise VDI.UnexpectedVDIType(_type, self.vdi)
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread] ***** iSCSI: EXCEPTION <class 'blktap2.VDI.UnexpectedVDIType'>, Target <class '__main__.ISCSIVDI'> has unex
pected VDI type ''
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]   File "/opt/xensource/sm/SRCommand.py", line 392, in run
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]     ret = cmd.run(sr)
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]   File "/opt/xensource/sm/SRCommand.py", line 113, in run
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]     return self._run_locked(sr)
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]   File "/opt/xensource/sm/SRCommand.py", line 163, in _run_locked
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]     rv = self._run(sr, target)
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]   File "/opt/xensource/sm/SRCommand.py", line 260, in _run
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]     writable, caching_params=caching_params)
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]   File "/opt/xensource/sm/blktap2.py", line 1616, in attach
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]     {"rdonly": not writable})
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]   File "/opt/xensource/sm/blktap2.py", line 1854, in _activate
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]     if self.tap_wanted():
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]   File "/opt/xensource/sm/blktap2.py", line 1154, in tap_wanted
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]     vdi_type = self.target.get_vdi_type()
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]   File "/opt/xensource/sm/blktap2.py", line 1207, in get_vdi_type
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]     raise VDI.UnexpectedVDIType(_type, self.vdi)
Aug  4 17:21:28 r620-x1 SM: [202712][MainThread]
```

Signed-off-by: Damien Thenot <damien.thenot@vates.tech>

Author: Nambrok

drivers/LUNperVDI.py

@@ -38,6 +38,7 @@ def load(self, vdi_uuid) -> None:
         self.uuid = vdi_uuid
         self.location = vdi_uuid
         self.managed = False
+        self.vdi_type = "phy"
         try:
             vdi_ref = self.sr.session.xenapi.VDI.get_by_uuid(vdi_uuid)
             self.managed = self.sr.session.xenapi.VDI.get_managed(vdi_ref)