disk-usage: Verbosity parameter which includes only FS in an error state.

[drapiti]

Describe the solution you'd like

Please allow the disk-usage plugin a verbosity parameter which when set to 0 for example only outputs FS which are effectively in an error state. (warning or critical). At them momento all FS which are checked are included in the output with no possibility to filter them. This is a standard feature which is normally present in most checks. We have systems with hundreds of FS and when we publish an alert on to an event console for example this creates issues with the output length.

Additional context

No response