MM-56879: Migrate caches from store layer to cache layer (#26255)

There were 3 remaining caches which were there in the store layer.
We migrate them to make the store layer fully free
from any caches.

https://mattermost.atlassian.net/browse/MM-56879

```release-note
NONE
```

Co-authored-by: Mattermost Build <build@mattermost.com>

server/channels/app/platform/cluster_handlers.go

@@ -17,9 +17,6 @@ func (ps *PlatformService) RegisterClusterHandlers() {
 	ps.clusterIFace.RegisterClusterMessageHandler(model.ClusterEventPublish, ps.ClusterPublishHandler)
 	ps.clusterIFace.RegisterClusterMessageHandler(model.ClusterEventUpdateStatus, ps.ClusterUpdateStatusHandler)
 	ps.clusterIFace.RegisterClusterMessageHandler(model.ClusterEventInvalidateAllCaches, ps.ClusterInvalidateAllCachesHandler)
-	ps.clusterIFace.RegisterClusterMessageHandler(model.ClusterEventInvalidateCacheForChannelMembersNotifyProps, ps.clusterInvalidateCacheForChannelMembersNotifyPropHandler)
-	ps.clusterIFace.RegisterClusterMessageHandler(model.ClusterEventInvalidateCacheForChannelByName, ps.clusterInvalidateCacheForChannelByNameHandler)
-	ps.clusterIFace.RegisterClusterMessageHandler(model.ClusterEventInvalidateCacheForUser, ps.clusterInvalidateCacheForUserHandler)
 	ps.clusterIFace.RegisterClusterMessageHandler(model.ClusterEventInvalidateCacheForUserTeams, ps.clusterInvalidateCacheForUserTeamsHandler)
 	ps.clusterIFace.RegisterClusterMessageHandler(model.ClusterEventBusyStateChanged, ps.clusterBusyStateChgHandler)
 	ps.clusterIFace.RegisterClusterMessageHandler(model.ClusterEventClearSessionCacheForUser, ps.clusterClearSessionCacheForUserHandler)
@@ -70,18 +67,6 @@ func (ps *PlatformService) ClusterInvalidateAllCachesHandler(msg *model.ClusterM
 	ps.InvalidateAllCachesSkipSend()
 }
 
-func (ps *PlatformService) clusterInvalidateCacheForChannelMembersNotifyPropHandler(msg *model.ClusterMessage) {
-	ps.invalidateCacheForChannelMembersNotifyPropsSkipClusterSend(string(msg.Data))
-}
-
-func (ps *PlatformService) clusterInvalidateCacheForChannelByNameHandler(msg *model.ClusterMessage) {
-	ps.invalidateCacheForChannelByNameSkipClusterSend(msg.Props["id"], msg.Props["name"])
-}
-
-func (ps *PlatformService) clusterInvalidateCacheForUserHandler(msg *model.ClusterMessage) {
-	ps.InvalidateCacheForUserSkipClusterSend(string(msg.Data))
-}
-
 func (ps *PlatformService) clusterInvalidateCacheForUserTeamsHandler(msg *model.ClusterMessage) {
 	ps.invalidateWebConnSessionCacheForUser(string(msg.Data))
 }
@@ -118,23 +103,6 @@ func (ps *PlatformService) clusterBusyStateChgHandler(msg *model.ClusterMessage)
 	}
 }
 
-func (ps *PlatformService) invalidateCacheForChannelMembersNotifyPropsSkipClusterSend(channelID string) {
-	ps.Store.Channel().InvalidateCacheForChannelMembersNotifyProps(channelID)
-}
-
-func (ps *PlatformService) invalidateCacheForChannelByNameSkipClusterSend(teamID, name string) {
-	if teamID == "" {
-		teamID = "dm"
-	}
-
-	ps.Store.Channel().InvalidateChannelByName(teamID, name)
-}
-
-func (ps *PlatformService) InvalidateCacheForUserSkipClusterSend(userID string) {
-	ps.Store.Channel().InvalidateAllChannelMembersForUser(userID)
-	ps.invalidateWebConnSessionCacheForUser(userID)
-}
-
 func (ps *PlatformService) invalidateWebConnSessionCacheForUser(userID string) {
 	hub := ps.GetHubForUserId(userID)
 	if hub != nil {