Draft: Take NUMBER OF FIRST TIME STEP into account for graphic printouts

Reference issue

Fix #1035

Description

The check performed when NUMBER OF FIRST TIME STEP FOR GRAPHIC PRINTOUTS was set to a non-zero value did not work properly. These changes fix this issue for both FE and FV calculations, so that it is now correctly taken into account when writing graphic printouts.

This MR also removes the unused variable COMPLIS.

Checklist

All Merge Requests:

• Update NEWS.txt to describe your changes.
• Run compile_telemac.py --check to check FORTRAN coding conventions.
• Run pylint to check Python coding conventions.
• If you added new files, run compile_telemac.py --clean --rescan and commit the updated cmdf file(s) accordingly.
• Run compile_telemac.py --clean for both normal and debug configurations.
• Run validate_telemac.py for both normal and debug configurations.
• Run validate_telemac.py --notebook for both normal and debug configurations.
• Run doc_telemac.py if there are any modifications in the documentation.
• Run damocles.py --eficas if there are any modifications in the dictionaries.

In addition, for a new feature:

• Check that your feature works in both serial and parallel modes.
• Add at least one test case to check the functionality (with documentation, graphics and VnV script)
• Update the documentation for the module in which your feature will be available.