MM-57326: [Shared Channels] Message priority, acknowledgement and persistent notifications need to be synced (#30736)

server/channels/db/migrations/postgres/000141_add_remoteid_channelid_to_post_acknowledgements.down.sql

@@ -0,0 +1,2 @@
+ALTER TABLE postacknowledgements DROP COLUMN IF EXISTS remoteid;
+ALTER TABLE postacknowledgements DROP COLUMN IF EXISTS channelid;

server/channels/db/migrations/postgres/000141_add_remoteid_channelid_to_post_acknowledgements.up.sql

@@ -0,0 +1,2 @@
+ALTER TABLE postacknowledgements ADD COLUMN IF NOT EXISTS remoteid VARCHAR(26) DEFAULT '';
+ALTER TABLE postacknowledgements ADD COLUMN IF NOT EXISTS channelid VARCHAR(26) DEFAULT '';