Add messaging to documentation about sample migration #9815
Description
We should alert the community to where our samples are and that they are currently in migration to spring-security-samples.
An admonition in our documentation would likely suffice. It would explain where samples were (so that readers can find them in the meantime) and where they are now.
Since this first released in 5.5, this message should be backported to the 5.5 documentation as well.