feat: declare USES_SSH = False and REBOOT_SETTLE_SECONDS = 90

Both were facts about this driver that netOrk kept in hardcoded driver-name
sets, each duplicated across a file pair (netork#113). The driver is the right
place for them: everything runs over the PVE REST API, and a node reboots
through a full init sequence plus storage checks before it is worth polling.

napalm_proxmox/driver.py

@@ -78,6 +78,10 @@ class ProxmoxDriver(
 
     VENDOR = "Proxmox"
     DRIVER_NAME = "proxmox"
+    # Everything runs over the Proxmox REST API; there is no SSH session.
+    USES_SSH = False
+    # A PVE node reboots through a full init sequence plus storage checks.
+    REBOOT_SETTLE_SECONDS = 90
     PORT_SPECS = [
         PortSpec("https", 8006, weight=8.0),
     ]