Private methods can never be intercepted, so it makes no sense to check if they are fault tolerance methods or to register them as such.

In fact, when compiling to native image, this used to cause a problem with reflection registration. ArC automatically registers intercepted methods for reflection, but it doesn't register `private` methods (because they cannot be intercepted). SmallRye Fault Tolerance tries to reflect on all fault tolerance methods, which used to fail on private methods. This commit fixes that.

Fixes #47509