www/tomcat-devel: update to 11.0.0-M15

Changelog:
https://tomcat.apache.org/tomcat-11.0-doc/changelog.html#Tomcat_11.0.0-M15_(markt)

Approved by: arrowd (mentor, implicit)
MFH: 2023Q4

(cherry picked from commit e773b0382b9765e2bb7063889889f7997c9f1861)