Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

server/platform/services/searchengine/bleveengine/testlib.go

@@ -0,0 +1,23 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package bleveengine
+
+import (
+	"fmt"
+
+	"github.com/mattermost/mattermost-server/v6/model"
+)
+
+func createPost(userId string, channelId string) *model.Post {
+	post := &model.Post{
+		Message:       model.NewRandomString(15),
+		ChannelId:     channelId,
+		PendingPostId: model.NewId() + ":" + fmt.Sprint(model.GetMillis()),
+		UserId:        userId,
+		CreateAt:      1000000,
+	}
+	post.PreSave()
+
+	return post
+}