kie-issues#1613: Add `CI :: Check license headers` GitHub Actions workflow (#3130)

* Add license header

* Revert "Add license header"

This reverts commit be404f10de65dff2a48e001bc7699f92d50dd475.

* .rat-excludes

* align naming with kie-issues#1613 ensemble

* moce licenses into single file

* LICENSE.txt -> LICENSE

* Remove NOTICE

* Add jstree, jquery in .rat-excludes

* NOTICE recreated
5 files changed