Add initial Native section to reference docs

[marcusdacoregio]

To make it easier to communicate what is supported in Spring Security and what are the limitations when working with native images, we should add a new section in the reference manual to include information about native support

[marcusdacoregio]

It is not clear yet what should be in there since Spring Boot has good documentation about native already.

[marcusdacoregio]

Reopening this since there is a use case that we should approach in a dedicated native section #13226