[MM-41170] Disable bot accounts from getting notification emails (#19447)

app/notification.go

@@ -646,6 +646,11 @@ func max(a, b int64) int64 {
 }
 
 func (a *App) userAllowsEmail(user *model.User, channelMemberNotificationProps model.StringMap, post *model.Post) bool {
+	// if user is a bot account, then we do not send email
+	if user.IsBot {
+		return false
+	}
+
 	userAllowsEmails := user.NotifyProps[model.EmailNotifyProp] != "false"
 
 	// if CRT is ON for user and the post is a reply disregard the channelEmail setting