* Handle stale database connection from datasources
* Fix potential secondary case of stale connection error
* Fix Postgres to MySQL
* Move validity check timeout to a constant field
* Add test for recovery when stale connection error is thrown
This commit adds the Mysql plugin to the Appsmith server. We also add a migration to ensure that this plugin is installed by default for all existing organizations. The migration also adds the plugin details into the DB.
Also adding the test cases for mysql plugin.
Co-authored-by: Arpit Mohan <arpit@appsmith.com>
Co-authored-by: Hetu Nandu <hetu@appsmith.com>
Co-authored-by: Arpit Mohan <me@arpitmohan.com>
Co-authored-by: Nupur Singhal <nupursinghal@Nupurs-MacBook-Air.local>
