MM-56629 Render Markdown in batched email notifications (#26217)

* [MM-56629] rendered markdown in batched email (#26116)

* [MM-56629] added unit test for GenerateHyperlinkForChannels (#26116)

* [MM-56629] refactored code to remove duplicates, updated test (#26116)

* [MM-56629] updated landing url and cleared check-style (#26116)

* [MM-56629] added app-layesrs and mocks (#26116)

* [MM-56629] updated unit tests (#26116)

* [MM-56629] reverted changes of removing unused context parameter (#26116)

* [MM-56629] removed unused method generateHyperlinkForChannels (#26116)

* [MM-56629] fixed check-style error (#26116)

* [MM-56629] refactored (#26116)

---------

Co-authored-by: Sazzad Hossain <sazzad.hossain@marginedge.com>
Co-authored-by: Harrison Healey <harrisonmhealey@gmail.com>

server/channels/app/email/email_batching.go

@@ -332,12 +332,13 @@ func (es *Service) sendBatchedEmailNotification(userID string, notifications []*
 				channelDisplayName = truncateUserNames(channel.DisplayName, 11)
 			}
 
+			postMessage := es.GetMessageForNotification(notification.post, notification.teamName, siteURL, translateFunc)
 			postsData = append(postsData, &postData{
 				SenderPhoto:              senderPhoto,
 				SenderName:               truncateUserNames(sender.GetDisplayName(displayNameFormat), 22),
 				Time:                     t,
 				ChannelName:              channelDisplayName,
-				Message:                  template.HTML(es.GetMessageForNotification(notification.post, translateFunc)),
+				Message:                  template.HTML(postMessage),
 				MessageURL:               MessageURL,
 				ShowChannelIcon:          showChannelIcon,
 				OtherChannelMembersCount: otherChannelMembersCount,