MM-62745: [Shared Channels] Fix duplicate mentioning - local user with the same username as someone on the remote server - Part2 (#32101) (#33414)

Automatic Merge

server/channels/app/shared_channel_service_iface.go

@@ -6,6 +6,7 @@ package app
 // TODO: platform: remove this and use from platform package
 import (
 	"github.com/mattermost/mattermost/server/public/model"
+	"github.com/mattermost/mattermost/server/public/shared/request"
 	"github.com/mattermost/mattermost/server/v8/platform/services/sharedchannel"
 )
 
@@ -27,6 +28,7 @@ type SharedChannelServiceIFace interface {
 	CheckChannelIsShared(channelID string) error
 	CheckCanInviteToSharedChannel(channelId string) error
 	HandleMembershipChange(channelID, userID string, isAdd bool, remoteID string)
+	TransformMentionsOnReceiveForTesting(ctx request.CTX, post *model.Post, targetChannel *model.Channel, rc *model.RemoteCluster, mentionTransforms map[string]string)
 }
 
 func NewMockSharedChannelService(service SharedChannelServiceIFace) *mockSharedChannelService {