Spring Support AOT registration of Spring Factories

As seen in #27753, SpringFactoriesLoader is currently supported in Spring Native through subtitutions and complex AOT processors.

We'd like to improve SpringFactoriesLoader and allow static registration of Spring Factories, something our AOT processing could leverage and call early during application startup. Once a Factory type is registered with entries, SpringFactoriesLoader should use this entry as a pre-warmed cache and never look for additional entries in spring.factories files, skipping all the resource loading and reflection operations.

Instead of registering String instances as entries, this new contract might take Supplier instances instead, maybe mirroring the new contract to be added in #27954