[bitnami/tomcat] Add prometheusRules support (#8401)

* [bitnami/tomcat] Fix issue on network policy

* [bitnami/tomcat] bump tomcat version

* [bitnami/tomcat] Update np to use common capabilities function

* [bitnami/tomcat] Networkpolicy

* [bitnami/cassandra,etcd,influxdb,metallb,mysql,postgresql,postgresql-ha,redis] Align networkpolicy to used common function common.capabilities.networkPolicy.apiVersion

* [bitnami/tomcat] Add prometheusRules support

* [bitnami/tomcat]

fix trailing-spaces

* Update bitnami/tomcat/templates/prometheusrule.yaml

Co-authored-by: Ibone González Mauraza <gibone@vmware.com>

* Update bitnami/tomcat/templates/prometheusrule.yaml

Co-authored-by: Ibone González Mauraza <gibone@vmware.com>

* Update bitnami/tomcat/Chart.yaml

Co-authored-by: Carlos Rodríguez Hernández <carrodher1179@gmail.com>

* [bitnami/tomcat] Fix prometheusRules

Co-authored-by: Ibone González Mauraza <gibone@vmware.com>
Co-authored-by: Carlos Rodríguez Hernández <carrodher1179@gmail.com>

bitnami/tomcat/values.yaml

@@ -631,3 +631,30 @@ metrics:
     ## @param metrics.podMonitor.relabelings [array] Prometheus relabeling rules
     ##
     relabelings: []
+  ## Custom PrometheusRule to be defined
+  ## The value is evaluated as a template, so, for example, the value can depend on .Release or .Chart
+  ## ref: https://github.com/coreos/prometheus-operator#customresourcedefinitions
+  ##
+  prometheusRule:
+    ## @param metrics.prometheusRule.enabled Set this to true to create prometheusRules for Prometheus operator
+    ##
+    enabled: false
+    ## @param metrics.prometheusRule.additionalLabels Additional labels that can be used so prometheusRules will be discovered by Prometheus
+    ##
+    additionalLabels: {}
+    ## @param metrics.prometheusRule.namespace namespace where prometheusRules resource should be created
+    ##
+    namespace: ""
+    ## @param metrics.prometheusRule.rules Create specified [Rules](https://prometheus.io/docs/prometheus/latest/configuration/alerting_rules/)
+    ## Make sure to constraint the rules to the current tomcat service.
+    ## rules:
+    ##   - alert: HugeReplicationLag
+    ##     expr: up{service="{{ template "common.names.fullname" . }}-metrics"} < 1
+    ##     for: 1m
+    ##     labels:
+    ##       severity: critical
+    ##     annotations:
+    ##       description: Service {{ template "common.names.fullname" . }} Tomcat is down since 1m.
+    ##       summary: Tomcat instance is down.
+    ##
+    rules: []