MM-22706: pass along set_online flag in websocket response (#14591)

* MM-22706: pass along set_online flag in websocket response

To let the client know whether a user has created a post without
being online or not, we get the set_online query param and
pass it down to the websocket event being passed down to the client.

With this PR, the "data" field of the `posted` event will contain
a `set_online` boolean field set to true/false depending on the
query_param set_online value set in the createPost call.

* Setting to false for auto responder

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

app/bot.go

@@ -57,7 +57,7 @@ func (a *App) CreateBot(bot *model.Bot) (*model.Bot, *model.AppError) {
 			Message:   T("api.bot.teams_channels.add_message_mobile"),
 		}
 
-		if _, err := a.CreatePostAsUser(botAddPost, a.Session().Id); err != nil {
+		if _, err := a.CreatePostAsUser(botAddPost, a.Session().Id, true); err != nil {
 			return nil, err
 		}
 	}
@@ -342,7 +342,7 @@ func (a *App) notifySysadminsBotOwnerDeactivated(userId string) *model.AppError
 			Type:      model.POST_SYSTEM_GENERIC,
 		}
 
-		_, appErr = a.CreatePost(post, channel, false)
+		_, appErr = a.CreatePost(post, channel, false, true)
 		if appErr != nil {
 			return appErr
 		}