Create spring-boot-autoconfigure-classic module

[philwebb]

We'd like a module that gives something similar to the experience of Spring Boot 3.x by providing all our new modules without any of their transitive dependencies.

[wilkinsona]

Unfortunately, we're going to have to revert this. The approach of using transitive = false, which maps to a wildcard exclusion in the pom, does not work with Maven's exclusion semantics as it makes it very hard to get the excluded dependencies back again when you want to.

I'm going to leave this open for now as we may still want to do something in this area, even if we don't know what that could be at the moment.