Prep for MS Teams plugin API (#25565)

* - columns added to ShareChannelRemotes: lastpostcreateat, lastpostupdateat
- SyncMsg and SyncResponse moved to `model` package
- field added to RemoteCluster struct: PluginID

* sync new posts before updated posts to ensure post order in MS Teams

* add plugid to remoteclusters table and store

* don't sync history by default

server/channels/db/migrations/migrations.list

@@ -230,6 +230,8 @@ channels/db/migrations/mysql/000115_user_reporting_changes.down.sql
 channels/db/migrations/mysql/000115_user_reporting_changes.up.sql
 channels/db/migrations/mysql/000116_create_outgoing_oauth_connections.down.sql
 channels/db/migrations/mysql/000116_create_outgoing_oauth_connections.up.sql
+channels/db/migrations/mysql/000117_msteams_shared_channels.down.sql
+channels/db/migrations/mysql/000117_msteams_shared_channels.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
@@ -460,3 +462,5 @@ channels/db/migrations/postgres/000115_user_reporting_changes.down.sql
 channels/db/migrations/postgres/000115_user_reporting_changes.up.sql
 channels/db/migrations/postgres/000116_create_outgoing_oauth_connections.down.sql
 channels/db/migrations/postgres/000116_create_outgoing_oauth_connections.up.sql
+channels/db/migrations/postgres/000117_msteams_shared_channels.down.sql
+channels/db/migrations/postgres/000117_msteams_shared_channels.up.sql