Validate that `private` JUnit Jupiter lifecycle methods are not annotated with `@Autowired`

[sbrannen]

Overview

In #25966, we introduced support to validate that JUnit Jupiter test methods and lifecycle methods are not annotated with @Autowired, and we explicitly filtered out private methods since JUnit Jupiter has always claimed that private test and lifecycle methods are not supported.

However, by accident, private lifecycle methods are actually supported even if discouraged.

In light of that, we should update our validation check to include private methods as well.

Related Issues

• Validate that JUnit Jupiter test methods and lifecycle methods are not annotated with @Autowired #25966
• Private lifecycle methods should cause an exception junit-team/junit-framework#2914
• Revert disallowing private lifecycle methods junit-team/junit-framework#3242