need to update clickhouse-keeper alert rules for actual prometheus metircs

[tman5]

Are these metric names even valid for clickhouse-keeper anymore? I don't see the /metrics endpoint for keeper exposing them unless I'm missing something?

clickhouse-operator/deploy/prometheus/prometheus-alert-rules-chkeeper.yaml

Line 64 in b0dc549

expr: zk_outstanding_requests{app=~'clickhouse-keeper.*'} > 10

[Slach]

this is outdated keeper alert rules, for old clickhouse-keeper version which not provided prometheus endpoint

i hope we will update these rules in the future