Zephyr high-level and functional requirements: migrate to RELATIONS and auto-generate UIDs

[stanislaw]

This work concludes the assignment of ZEP-based UIDs to all existing Zephyr requirements.

The last auto-generated UID is ZEP-121 which matches the total number of requirements.

The first two commits update the requirements to be in accordance with the latest StrictDoc conventions:

• The deprecated REFS field has been renamed to the RELATIONS field.
• The RELATIONS field is now the last field in each requirement.

The third commit auto-generates the remaining UIDs.

The changes can be reviewed commit-by-commit.

[simhein]

Thanks for adding this it looks good to me one thing which is missing is the sign off in the commits. Can you adapt your commits?

[stanislaw]

Thanks for adding this it looks good to me one thing which is missing is the sign off in the commits. Can you adapt your commits?

I was adding the signed-off lines all along but then forgot to revise them during the final rebase. Now the lines should be in place. Please check again.