`@Configuration` doc improvements
`@Configuration` doc improvements

Various documentation improvements related to `@Configuration` and
`Bean`. Better describe how method parameter can be used to declare
dependencies of a particular bean. Also add an explicit mentions related
to "hard-wiring" of dependencies in configuration classes.

Issue: SPR-12773

spring-projects/spring-framework,spring-projects/spring-framework,spring-projects/spring-framework,spring-projects/spring-framework,spring-projects/spring-framework,spring-projects/spring-framework,spring-projects/spring-framework