Changes the database type options in the installer and global config to not display these drivers
Removes the Smart Search adapter for SQL Server; we only have adapters here for the supported engines
Removes handling for SQL Server DDL in the database model of the install app
Note I've explicitly kept the schema changeset class for SQL Server in. In essence it's just reading a bunch of SQL files and checking their structure against the database, it's a useful API for anyone who might be building custom projects connecting to a SQL Server database separate from the main Joomla core needs.
Testing Instructions
In a SQL Server environment, you'll no longer have this driver listed in the config options.
Documented with https://docs.joomla.org/Potential_backward_compatibility_issues_in_Joomla_4#Updated_System_Requirements