net/kafka: Update 4.3.0 => 4.3.1

While here:

• Fix incorrect behaviour of log4j2 in rc.d script.
• Sort SUB_LIST (pet portfmt).

Release Announcement:
https://kafka.apache.org/blog/2026/06/25/apache-kafka-4.3.1-release-announcement/
Upgrading Notes:
https://kafka.apache.org/43/getting-started/upgrade/#upgrading-to-431
Release Notes:
https://downloads.apache.org/kafka/4.3.1/RELEASE_NOTES.html

PR: 298075
Approved by: Pavel Timofeev <timp87@gmail.com> (maintainer timeout, 2 weeks)
Approved by: osa, vvd (Mentors, implicit)
MFH: 2026Q3