[MM-58355] Send invalidate cache message across the cluster so that websocket connections on other instances are invalidated correctly (#27204)

* [MM-58355] Send invalidate cache message across the cluster so that websocket connections on other instances are invalidated correctly

* Add suggestion to clear the session cache on the local node as well

* Force read from master DB when gettting channel members for websocket to avoid any DB sync issues

* PR feedback

* Missed generated files

server/channels/app/platform/session.go

@@ -70,7 +70,7 @@ func (ps *PlatformService) ClearAllUsersSessionCacheLocal() {
 }
 
 func (ps *PlatformService) ClearUserSessionCache(userID string) {
-	ps.ClearUserSessionCacheLocal(userID)
+	ps.ClearSessionCacheForUserSkipClusterSend(userID)
 
 	if ps.clusterIFace != nil {
 		msg := &model.ClusterMessage{

server/channels/app/platform/web_conn.go

@@ -26,6 +26,7 @@ import (
 	"github.com/mattermost/mattermost/server/public/shared/i18n"
 	"github.com/mattermost/mattermost/server/public/shared/mlog"
 	"github.com/mattermost/mattermost/server/public/shared/request"
+	"github.com/mattermost/mattermost/server/v8/channels/store/sqlstore"
 )
 
 const (
@@ -895,7 +896,12 @@ func (wc *WebConn) ShouldSendEvent(msg *model.WebSocketEvent) bool {
 		}
 
 		if wc.allChannelMembers == nil {
-			result, err := wc.Platform.Store.Channel().GetAllChannelMembersForUser(wc.UserId, false, false)
+			result, err := wc.Platform.Store.Channel().GetAllChannelMembersForUser(
+				sqlstore.RequestContextWithMaster(request.EmptyContext(wc.Platform.logger)),
+				wc.UserId,
+				false,
+				false,
+			)
 			if err != nil {
 				mlog.Error("webhub.shouldSendEvent.", mlog.Err(err))
 				return false

server/channels/app/platform/web_hub.go

@@ -197,7 +197,7 @@ func (ps *PlatformService) InvalidateCacheForChannelPosts(channelID string) {
 
 func (ps *PlatformService) InvalidateCacheForUser(userID string) {
 	ps.Store.Channel().InvalidateAllChannelMembersForUser(userID)
-	ps.invalidateWebConnSessionCacheForUser(userID)
+	ps.ClearUserSessionCache(userID)
 
 	ps.Store.User().InvalidateProfilesInChannelCacheByUser(userID)
 	ps.Store.User().InvalidateProfileCacheForUser(userID)