[➕ Feature]: Add more severity options for prometheus and victoriametrics

[alexandershelega]

Please add more options for severity like

major security uptime

add this moment keep support only 4 label - low,info,warning and critical this is not enough for complex environments

also would be perfect be free in choosing labels

Thanks in advance

[shahargl]

Will think about the best way of doing it so you could add your own severity levels.