Modify CTA code to enforce VID uppercase

As discussed in #175 (closed), we are adding a new constraint to the catalogue schema v13 to enforce uppercase VIDs:

CONSTRAINT TAPE_VID_CK CHECK(VID = UPPER(VID));

As mentioned there, both the CTA frontend and the cta-tape-label code need to check in their input that the VIDs are all uppercase, even though the catalogue will also enforce it. This is a prerequisite for adding the constraint to the catalogue.

For more details check #175 (closed).