Migrate emojiStore to use request.CTX instead of context.Context (#24514)

* migrate emojistore to request.ctx

* use mlog.CreateConsoleTestLogger

* Add comment to WithMaster and RequestContextWithMaster

server/channels/store/store.go

@@ -662,9 +662,9 @@ type DesktopTokensStore interface {
 
 type EmojiStore interface {
 	Save(emoji *model.Emoji) (*model.Emoji, error)
-	Get(ctx context.Context, id string, allowFromCache bool) (*model.Emoji, error)
-	GetByName(ctx context.Context, name string, allowFromCache bool) (*model.Emoji, error)
-	GetMultipleByName(ctx context.Context, names []string) ([]*model.Emoji, error)
+	Get(ctx request.CTX, id string, allowFromCache bool) (*model.Emoji, error)
+	GetByName(ctx request.CTX, name string, allowFromCache bool) (*model.Emoji, error)
+	GetMultipleByName(ctx request.CTX, names []string) ([]*model.Emoji, error)
 	GetList(offset, limit int, sort string) ([]*model.Emoji, error)
 	Delete(emoji *model.Emoji, timestamp int64) error
 	Search(name string, prefixOnly bool, limit int) ([]*model.Emoji, error)