Alerting: support mute timings configuration through the api for the embedded alertmanager (#41533) (#41990)

* Alerting: accept mute_timing_intervals through the api for the embedded alertmanager

* add workaround for mutetimeinterval

* add mute timings to routes

* revert changes

* Update pkg/services/ngalert/api/api_alertmanager.go

* Update pkg/services/ngalert/api/api_alertmanager.go

* Update pkg/services/ngalert/api/api_alertmanager.go

* update prometheus/alertmanager dependency

* add some var docs

(cherry picked from commit b9cdad3814)

Co-authored-by: Jean-Philippe Quéméner <JohnnyQQQQ@users.noreply.github.com>

pkg/services/ngalert/api/tooling/definitions/alertmanager.go

@@ -587,10 +587,11 @@ func (c *GettableApiAlertingConfig) validate() error {
 
 // Config is the top-level configuration for Alertmanager's config files.
 type Config struct {
-	Global       *config.GlobalConfig  `yaml:"global,omitempty" json:"global,omitempty"`
-	Route        *Route                `yaml:"route,omitempty" json:"route,omitempty"`
-	InhibitRules []*config.InhibitRule `yaml:"inhibit_rules,omitempty" json:"inhibit_rules,omitempty"`
-	Templates    []string              `yaml:"templates" json:"templates"`
+	Global            *config.GlobalConfig      `yaml:"global,omitempty" json:"global,omitempty"`
+	Route             *Route                    `yaml:"route,omitempty" json:"route,omitempty"`
+	InhibitRules      []*config.InhibitRule     `yaml:"inhibit_rules,omitempty" json:"inhibit_rules,omitempty"`
+	MuteTimeIntervals []config.MuteTimeInterval `yaml:"mute_time_intervals,omitempty" json:"mute_time_intervals,omitempty"`
+	Templates         []string                  `yaml:"templates" json:"templates"`
 }
 
 // A Route is a node that contains definitions of how to handle alerts. This is modified

pkg/services/ngalert/api/tooling/definitions/alertmanager_test_artifact.json

@@ -3,6 +3,19 @@
     "foo": "bar"
   },
   "alertmanager_config": {
+    "mute_time_intervals": [
+      {
+        "name": "foo",
+        "time_intervals": [
+          {
+            "years": [
+              "2020:2022",
+              "2030"
+            ]
+          }
+        ]
+      }
+    ],
     "receivers": [
       {
         "email_configs": [

pkg/services/ngalert/api/tooling/definitions/alertmanager_test_artifact.yaml

@@ -1,6 +1,12 @@
 template_files:
     foo: bar
 alertmanager_config: |
+    mute_time_intervals:
+        - name: foo
+          time_intervals:
+            - years:
+                - 2020:2022
+                - "2030"
     receivers:
         - email_configs:
             - auth_password: shh