[MM-45868] Replace TeamId column with ThreadTeamId (#21505)

* Replace TeamId column with TreadTeamId

* make migrations-extract

db/migrations/postgres/000096_threads_threadteamid.up.sql

@@ -0,0 +1,5 @@
+-- Drop any existing TeamId column from 000094_threads_teamid.up.sql
+ ALTER TABLE threads DROP COLUMN IF EXISTS teamid;
+
+ALTER TABLE threads ADD COLUMN IF NOT EXISTS threadteamid VARCHAR(26);
+UPDATE threads SET threadteamid = channels.teamid FROM channels WHERE threads.threadteamid IS NULL AND channels.id = threads.channelid;