MM-52600: [Shared Channels] Shared channels do not sync channel membership (#30976)

server/channels/db/migrations/migrations.list

@@ -275,6 +275,8 @@ channels/db/migrations/mysql/000138_add_default_category_name_to_channel.down.sq
 channels/db/migrations/mysql/000138_add_default_category_name_to_channel.up.sql
 channels/db/migrations/mysql/000139_remoteclusters_add_last_global_user_sync_at.down.sql
 channels/db/migrations/mysql/000139_remoteclusters_add_last_global_user_sync_at.up.sql
+channels/db/migrations/mysql/000140_add_lastmemberssyncat_to_sharedchannelremotes.down.sql
+channels/db/migrations/mysql/000140_add_lastmemberssyncat_to_sharedchannelremotes.up.sql
 channels/db/migrations/postgres/000001_create_teams.down.sql
 channels/db/migrations/postgres/000001_create_teams.up.sql
 channels/db/migrations/postgres/000002_create_team_members.down.sql
@@ -551,3 +553,5 @@ channels/db/migrations/postgres/000138_add_default_category_name_to_channel.down
 channels/db/migrations/postgres/000138_add_default_category_name_to_channel.up.sql
 channels/db/migrations/postgres/000139_remoteclusters_add_last_global_user_sync_at.down.sql
 channels/db/migrations/postgres/000139_remoteclusters_add_last_global_user_sync_at.up.sql
+channels/db/migrations/postgres/000140_add_lastmemberssyncat_to_sharedchannelremotes.down.sql
+channels/db/migrations/postgres/000140_add_lastmemberssyncat_to_sharedchannelremotes.up.sql