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/000028_create_tokens.up.sql

@@ -0,0 +1,33 @@
+CREATE TABLE IF NOT EXISTS tokens (
+    token VARCHAR(64) PRIMARY KEY,
+    createat bigint,
+    type VARCHAR(64),
+    extra VARCHAR(2048)
+);
+
+ALTER TABLE tokens ALTER COLUMN extra TYPE VARCHAR(2048);
+
+DO $$
+<<modify_column_type_if_type_is_different>>
+DECLARE
+    type_exists boolean := false;
+    col_exists boolean := false;
+BEGIN
+    SELECT count(*) != 0 INTO col_exists
+    FROM information_schema.columns
+    WHERE table_name = 'tokens'
+    AND table_schema = current_schema()
+    AND column_name = 'extra';
+
+    SELECT count(*) != 0 INTO type_exists
+    FROM information_schema.columns
+    WHERE table_name = 'tokens'
+    AND table_schema = current_schema()
+    AND column_name = 'extra'
+    AND data_type = 'character varying'
+    AND character_maximum_length = 2048;
+
+    IF col_exists AND NOT type_exists THEN
+        ALTER TABLE tokens ALTER COLUMN extra TYPE VARCHAR(2048);
+    END IF;
+END modify_column_type_if_type_is_different $$;