Pipeline: Shared Groovy Libraries through Nexus retrieval

List of issues
KeySummaryCreatedUpdated
#18chore(github): Add CODEOWNERS
#17chore(dependencies): Automate dependency updates with Dependabot
#16feat(java): Require Jenkins core 2.479.3 and Java 17.
#15Require 2.346.3
#14Update hamcrest
#13Bump workflow-job from 2.32 to 1295.v395eb_7400005
#1Use Maven from Jenkins toolbox