MM-32693: Use master when emoji_layer is invalidated (#16951)

We add a map which tracks invalidations to the emoji caches
and use master whenever a fresh item is fetched from DB.

https://mattermost.atlassian.net/browse/MM-32693

```release-note
NONE
```

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

store/retrylayer/retrylayer.go

@@ -3004,11 +3004,11 @@ func (s *RetryLayerEmojiStore) Delete(emoji *model.Emoji, time int64) error {
 
 }
 
-func (s *RetryLayerEmojiStore) Get(id string, allowFromCache bool) (*model.Emoji, error) {
+func (s *RetryLayerEmojiStore) Get(ctx context.Context, id string, allowFromCache bool) (*model.Emoji, error) {
 
 	tries := 0
 	for {
-		result, err := s.EmojiStore.Get(id, allowFromCache)
+		result, err := s.EmojiStore.Get(ctx, id, allowFromCache)
 		if err == nil {
 			return result, nil
 		}
@@ -3024,11 +3024,11 @@ func (s *RetryLayerEmojiStore) Get(id string, allowFromCache bool) (*model.Emoji
 
 }
 
-func (s *RetryLayerEmojiStore) GetByName(name string, allowFromCache bool) (*model.Emoji, error) {
+func (s *RetryLayerEmojiStore) GetByName(ctx context.Context, name string, allowFromCache bool) (*model.Emoji, error) {
 
 	tries := 0
 	for {
-		result, err := s.EmojiStore.GetByName(name, allowFromCache)
+		result, err := s.EmojiStore.GetByName(ctx, name, allowFromCache)
 		if err == nil {
 			return result, nil
 		}