contrib/kube-prometheus: Fix outdated alerts to use message annotation

jsonnet/kube-prometheus/alerts/alertmanager.libsonnet

@@ -7,8 +7,7 @@
           {
             alert: 'AlertmanagerConfigInconsistent',
             annotations: {
-              description: 'The configuration of the instances of the Alertmanager cluster `{{$labels.service}}` are out of sync.',
-              summary: 'Configuration out of sync',
+              message: 'The configuration of the instances of the Alertmanager cluster `{{$labels.service}}` are out of sync.',
             },
             expr: |||
               count_values("config_hash", alertmanager_config_hash{%(alertmanagerSelector)s}) BY (service) / ON(service) GROUP_LEFT() label_replace(prometheus_operator_alertmanager_spec_replicas{%(prometheusOperatorSelector)s}, "service", "alertmanager-$1", "alertmanager", "(.*)") != 1
@@ -21,8 +20,7 @@
           {
             alert: 'AlertmanagerDownOrMissing',
             annotations: {
-              description: 'An unexpected number of Alertmanagers were scraped or disappeared from discovery.',
-              summary: 'Alertmanager down or missing',
+              message: 'An unexpected number of Alertmanagers were scraped or disappeared from discovery.',
             },
             expr: |||
               label_replace(prometheus_operator_alertmanager_spec_replicas{%(prometheusOperatorSelector)s}, "job", "alertmanager-$1", "alertmanager", "(.*)") / ON(job) GROUP_RIGHT() sum(up{%(alertmanagerSelector)s}) BY (job) != 1
@@ -35,8 +33,7 @@
           {
             alert: 'AlertmanagerFailedReload',
             annotations: {
-              description: "Reloading Alertmanager's configuration has failed for {{ $labels.namespace }}/{{ $labels.pod}}.",
-              summary: "Alertmanager's configuration reload failed",
+              message: "Reloading Alertmanager's configuration has failed for {{ $labels.namespace }}/{{ $labels.pod}}.",
             },
             expr: |||
               alertmanager_config_last_reload_successful{%(alertmanagerSelector)s} == 0

jsonnet/kube-prometheus/alerts/general.libsonnet

@@ -7,8 +7,7 @@
           {
             alert: 'TargetDown',
             annotations: {
-              description: '{{ $value }}% of the {{ $labels.job }} targets are down.',
-              summary: 'Targets are down',
+              message: '{{ $value }}% of the {{ $labels.job }} targets are down.',
             },
             expr: '100 * (count(up == 0) BY (job) / count(up) BY (job)) > 10',
             'for': '10m',
@@ -19,8 +18,7 @@
           {
             alert: 'DeadMansSwitch',
             annotations: {
-              description: 'This is a DeadMansSwitch meant to ensure that the entire alerting pipeline is functional.',
-              summary: 'Alerting DeadMansSwitch',
+              message: 'This is a DeadMansSwitch meant to ensure that the entire alerting pipeline is functional.',
             },
             expr: 'vector(1)',
             labels: {