feat: VM provisioning, and reboot_host on ESXi

create_vm_from_cloud_init takes the same qcow2/raw cloud images netOrk
offers for Proxmox. ESXi can neither boot nor download them, so the
driver does both: download with checksum check and one retry, convert
with qemu-img to a streamOptimized VMDK (cached by URL), import through
a minimal OVF descriptor over NFC, pin requested MACs, grow the disk,
and attach a NoCloud seed ISO placed next to the VM's files. NoCloud
rather than guestinfo because it needs nothing in the guest; the
user-data installs open-vm-tools, which the driver declares as its
guest agent. A failure after the import removes the VM again.

Placement is a pure decision over inventory rows: a connected host
outside maintenance mode that sees the datastore and every port group,
with the resource pool and VM folder found by walking up to the
datacenter -- one path for a standalone host and for a vCenter.

Two faults vcsim surfaced and the tests now pin: a chunked upload body
next to a Content-Length is refused with 500, so the disk goes up as a
sized file object that also reports lease progress; and a device edit
replaces the device as sent, so disk and NIC edits start from the live
objects, backing included (vcsim panicked on a disk without one).

destroy_vm, get_vm_status, get_network_targets (port groups with their
fixed VLAN) and get_image_storages complete the contract.

reboot_host on ESXi uses RebootHost_Task and refuses outside
maintenance mode: force=True would cut power to running VMs.

Tested against vcsim in ESXi and vCenter mode, end to end.

tests/test_inventory.py

@@ -119,3 +119,15 @@ def test_properties_of_a_single_object(content):
 def test_properties_of_a_vanished_object(content):
     content.propertyCollector.RetrievePropertiesEx.return_value = None
     assert Inventory(content).properties(vim.Task("task-7", None), ["info.state"]) == {}
+
+
+def test_raw_properties_keep_the_pyvmomi_objects(content):
+    disk = vim.vm.device.VirtualDisk(key=2000, capacityInKB=1024)
+    content.propertyCollector.RetrievePropertiesEx.return_value = SimpleNamespace(
+        objects=[_content(vim.VirtualMachine("vm-1", None), {"config.hardware.device": [disk]})],
+        token=None,
+    )
+    props = Inventory(content).properties(
+        vim.VirtualMachine("vm-1", None), ["config.hardware.device"], raw=True
+    )
+    assert props["config.hardware.device"][0] is disk