Initial Custom Metrics - Node & Task Heartbeat (#3082)

* Refactor logging to use  and new function queue

* Testing setup of custom metric.

* Changing host.json

* Updating log interface.

* changes.

* Fix encoding.

* Updating.

* Updating tests.

* Adding metrics to program

* Pushing latest changes.

* Update interface references.

* Removing string type.

* Add string back.

* Getting additional data for task heartbeat.

* Removing additional fields.

* Removing containers.

* Cleaning up.

* Adding feature flag.

* Adding bicep changes.

* Fixing tests.

* Fixing test metrics.

* Removing most of tests.

* Telemetry Refact Round 2.

* Updated metrics.

* Remove custom metric function.

* Syncing events.cs

* Making optional.

* Using events as metric dimensions.

* Fixing ORM tests.

* Remove metric records.

* Removing bad test.

* Remove testmetrics.'

* Adding test back.

* Improving custom dimensions serialization.

* Update src/ApiService/ApiService/onefuzzlib/Metrics.cs

Co-authored-by: Cheick Keita <kcheick@gmail.com>

* Reverting change.

---------

Co-authored-by: Cheick Keita <kcheick@gmail.com>

src/deployment/bicep-templates/feature-flags.bicep

@@ -37,4 +37,17 @@ resource validateNotificationConfigSemantics 'Microsoft.AppConfiguration/configu
   }
 }
 
+resource enableCustomMetricFeatureFlag 'Microsoft.AppConfiguration/configurationStores/keyValues@2021-10-01-preview' = {
+  parent: featureFlags
+  name: '.appconfig.featureflag~2FEnableCustomMetricTelemetry'
+  properties: {
+    value: string({
+      id: 'EnableCustomMetricTelemetry'
+      description: 'Allow custom metrics to be sent.'
+      enabled: false
+    })
+    contentType: 'application/vnd.microsoft.appconfig.ff+json;charset=utf-8'
+  }
+}
+
 output AppConfigEndpoint string = 'https://${appConfigName}.azconfig.io'

src/deployment/bicep-templates/storageAccounts.bicep

@@ -33,6 +33,7 @@ var storageAccountFuncQueuesParams = [
   'update-queue'
   'webhooks'
   'signalr-events'
+  'custom-metrics'
 ]
 var fileChangesQueueIndex = 0