[make:auth] deprecate command

[jrushlow]

The make:auth command has been superseded by make:security:form-login (#1244) and make:security:custom (#1522).

Originally written to create login form authentication back in the days of "Guard Authenticators" - this command has reached it's EOL with the existence of the new Symfony Security System that was introduced in Symfony 5.x.

Although the command class itself is @internal - we'll:

• deprecate the command in v1.59.0 maintaining its existing functionality
• remove the existing functionality after the v1.59.0 release
• remove the command completely sometime after that.

I think this will give plenty of time to get the docs & book updated and "gently" push users to make:security:*

• Symfony Book 6.4 - Published

cc @fabpot - Symfony Book

[jrushlow]

Note: We're going to hold off on merging this until the Symfony 6.4 Book is published. Else, we "break" the user experience for those following along in the book.