Follow Prometheus naming convention for falco_events metric

[cezkuj]

Motivation
falco_events metric doesn't follow Prometheus naming convention causing issues with inferring its type in a monitoring system. In our case this is NewRelic Prometheus integration that uses remote write protocol. Metric is by default considered a gauge and needs manual overwrites to change its type to a counter.

Feature

Changing metric name from falco_events to falco_events_total

Additional context

I am aware that changing metric name is a breaking change, but it would be nice to have it changed at some point :)

[Issif]

😥 I released the 2.29.0 yesterday.
Falco now exposes a Prometheus endpoint, so I wanted to remove some metrics in sidekick cause they are in double with those in Falco in 2.30. Could be the occasion to do both. I don't have any ETA

[poiana]

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Mark the issue as fresh with /remove-lifecycle stale.

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/lifecycle stale

[Issif]

/remove-lifecycle stale