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/mysql/000105_remove_tokens.up.sql

@@ -0,0 +1,4 @@
+DELETE o, s from OAuthAccessData o 
+LEFT JOIN Preferences p ON o.clientid = p.name AND o.userid = p.userid AND p.category = 'oauth_app'
+INNER JOIN Sessions s ON o.token = s.token
+WHERE p.name IS NULL;