java/openjdk*: Deprecate unmaintained versions

Mark OpenJDK versions no longer maintained by upstream as deprecated,
and for future removal. Keeping LTS versions, as well as the actively
maintained latest versions in the tree.

Reviewed by: bofh (mentor), jrm
Approved by: bofh (mentor)
MFH: 2025Q4
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D54176