Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

server/channels/db/migrations/postgres/000104_upgrade_notifyadmin.up.sql

@@ -0,0 +1,2 @@
+ALTER TABLE NotifyAdmin ALTER COLUMN RequiredFeature TYPE VARCHAR(255);
+ALTER TABLE NotifyAdmin ALTER COLUMN RequiredPlan TYPE VARCHAR(100);