add avaje-validator-parent 2.15-RC3

[hboutemy]

https://github.com/jvm-repo-rebuild/reproducible-central/blob/master/content/io/avaje/validator/README.md

[github-actions]

• io.avaje:avaje-validator 2.15-RC3

./rebuild.sh content/io/avaje/validator/avaje-validator-2.15-RC3.buildspec

version=2.15-RC3
ok=19
ko=0
ignored=0
koFiles=""
ignoredFiles=""
reference_java_version="25 (from MANIFEST.MF Build-Jdk-Spec)"

docker build -q -t ghcr.io/jvm-repo-rebuild/rb-ubuntu-jdk25-toolchains-25
	1:01.16 real,	0.17 user,	0.12 sys
docker build -q -t ghcr.io/jvm-repo-rebuild/rb-ubuntu-jdk25-toolchains-25-maven-3.6.3
	0:07.26 real,	0.07 user,	0.06 sys
docker build -q -t ghcr.io/jvm-repo-rebuild/rb-ubuntu-jdk25-toolchains-25-maven-3.6.3-runner
	0:09.57 real,	0.08 user,	0.05 sys
docker build -q -t ghcr.io/jvm-repo-rebuild/rb-ubuntu-jdk25-toolchains-25-maven-3.6.3-runner-utc-en_us-0002
	0:11.63 real,	0.09 user,	0.05 sys
docker run --name rebuild-central --rm
	1:09.46 real,	0.01 user,	0.04 sys