implement and use striped LRU cache to lower mutex contention (#15764)

* Implement Striped LRU cache

* ci

* fix

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

store/sqlstore/channel_store.go

@@ -334,13 +334,13 @@ type publicChannel struct {
 	Purpose     string `json:"purpose"`
 }
 
-var allChannelMembersForUserCache = cache.NewLRU(&cache.LRUOptions{
+var allChannelMembersForUserCache = cache.NewLRU(cache.LRUOptions{
 	Size: ALL_CHANNEL_MEMBERS_FOR_USER_CACHE_SIZE,
 })
-var allChannelMembersNotifyPropsForChannelCache = cache.NewLRU(&cache.LRUOptions{
+var allChannelMembersNotifyPropsForChannelCache = cache.NewLRU(cache.LRUOptions{
 	Size: ALL_CHANNEL_MEMBERS_NOTIFY_PROPS_FOR_CHANNEL_CACHE_SIZE,
 })
-var channelByNameCache = cache.NewLRU(&cache.LRUOptions{
+var channelByNameCache = cache.NewLRU(cache.LRUOptions{
 	Size: model.CHANNEL_CACHE_SIZE,
 })