Boards data retention (#19262)

* add Boards to DataRetention, add hook for data retention

* remove replaces

* update hook to remove parameter

* add boards data retention to telemetry

* fix unit test

* update test, update hooks

* update RunDataRetention server version

* put behind a feature flag

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

plugin/hooks_timer_layer_generated.go

@@ -186,3 +186,10 @@ func (hooks *hooksTimerLayer) WebSocketMessageHasBeenPosted(webConnID, userID st
 	hooks.hooksImpl.WebSocketMessageHasBeenPosted(webConnID, userID, req)
 	hooks.recordTime(startTime, "WebSocketMessageHasBeenPosted", true)
 }
+
+func (hooks *hooksTimerLayer) RunDataRetention(nowTime, batchSize int64) (int64, error) {
+	startTime := timePkg.Now()
+	_returnsA, _returnsB := hooks.hooksImpl.RunDataRetention(nowTime, batchSize)
+	hooks.recordTime(startTime, "RunDataRetention", _returnsB == nil)
+	return _returnsA, _returnsB
+}