Update license headers for Release 3

Proposers

• Lluis Gifre (CTTC)

Description

Update license headers for Release 3. Implement appropriate refinements in script scripts/update_license_headers.py

Agreed copyright message: Copyright 2022-2024 ETSI OSG/SDG TeraFlowSDN (TFS) (https://tfs.etsi.org/)

Demo or definition of done

None

References

None