[MM-55014][MM-55015] Add last login timestamp for users, add materialized view and refresh job to keep track of post stats for Postgres (#25152)

* [MM-55014][MM-55015] Add last login timestamp for users, add materialized view and refresh job for Postgres

* Check fixes

* Fix type issue

* Add verification that lastlogin was updated

* PR feedback

* Morge'd

* Morge'd again

* Merge'd

* Update admin setting strings

* WIP

* PR feedback

* Oops

* Fix i18n

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

server/channels/db/migrations/mysql/000115_user_reporting_changes.down.sql

@@ -0,0 +1,14 @@
+SET @preparedStatement = (SELECT IF(
+    EXISTS(
+        SELECT 1 FROM INFORMATION_SCHEMA.STATISTICS
+        WHERE table_name = 'Users'
+        AND table_schema = DATABASE()
+        AND column_name = 'LastLogin'
+    ) > 0,
+    'ALTER TABLE Users DROP COLUMN LastLogin;',
+    'SELECT 1;'
+));
+
+PREPARE removeColumnIfExists FROM @preparedStatement;
+EXECUTE removeColumnIfExists;
+DEALLOCATE PREPARE removeColumnIfExists;

server/channels/db/migrations/mysql/000115_user_reporting_changes.up.sql

@@ -0,0 +1,14 @@
+SET @preparedStatement = (SELECT IF(
+    NOT EXISTS(
+        SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS
+        WHERE table_name = 'Users'
+        AND table_schema = DATABASE()
+        AND column_name = 'LastLogin'
+    ),
+    'ALTER TABLE Users ADD COLUMN LastLogin bigint NOT NULL DEFAULT 0;',
+    'SELECT 1;'
+));
+
+PREPARE addColumnIfNotExists FROM @preparedStatement;
+EXECUTE addColumnIfNotExists;
+DEALLOCATE PREPARE addColumnIfNotExists;