Some alerts added

[rezachalak]

Prometheus Alerts Added

Special thanks for this wonderfull repository.

The following alerts has been added:

• VMWarnDSOutOfSpace: to check datastore usage
• VMCritDSOutOfSpace: to check datastore usage
• VMCritDSInaccessible: to check datastore accessibility
• VMIstanceOff: to check whether VM instance is off or not
• HostSensorTemperatureHigh: to check all sensors temperature
• HostSensorTemperatureTooHigh: to check all sensors temperature
• HostDetached: to check ESXI host connection
• HostCPUUsageHigh: to check ESXI host CPU usage
• HostCPUUsageTooHigh: to check ESXI host CPU usage
• HostMaintenanceModeOn: to check whether the host goes to maintenance mode or not

Hope to help