[maven-release-plugin] prepare release v2.8.0 #936

Job	Run time
build (ubuntu-latest, 17, Client, false)	5m 36s
build (ubuntu-latest, 17, Server, false)	16m 45s
build (ubuntu-latest, 17, Core, false)	9m 4s
build (ubuntu-latest, 17, External, false)	9m 52s
build (ubuntu-latest, 17, Check-Updated-License-Files, false)	3m 48s
build (ubuntu-latest, 17, Integration-Test, false)	5m 1s
build (ubuntu-latest, 21, Client, false)	5m 1s
build (ubuntu-latest, 21, Server, false)	16m 37s
build (ubuntu-latest, 21, Core, false)	9m 3s
build (ubuntu-latest, 21, External, false)	10m 18s
build (ubuntu-latest, 21, Check-Updated-License-Files, false)	3m 59s
build (ubuntu-latest, 21, Integration-Test, false)	4m 27s
	1h 39m 31s

Provide feedback