Create rules for the Spring Security 6.0 migration path

[jmle]

According to the migration guide:

Spring Boot 3.0 uses Spring Security 6.0. The Spring Security team have released Spring Security 5.8 to simplify upgrading to Spring Security 6.0. Before upgrading to Spring Boot 3.0, consider upgrading your Spring Boot 2.7 application to Spring Security 5.8. The Spring Security team have produced a migration guide that will help you to do so. From there, you can follow the 5.8 to 6.0 migration guide when upgrading to Spring Boot 3.0.

We need to create a set of rules for the migration of Spring Security to the 6.0 version. This is a parent issue to hold those rules.

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