[RM-8441] Refactor warning flag recording when an error occur

Created on 2023-10-24 14:32:26 by Didier Vibert. % Done: 0

in develop (and 0.44) when running a QSO linemeas only, with a linemeas catalog without the required columns (eg qso.VelocityAbsorption) the error "Context warning flag already exists" still appears ...

<pre>
Info: processing ProcessingID
0 00005-00000-0,0-000000000000067d
Info: Using amazed reader
Info: Using amazed external storage
Info: Processing 00005-00000-0,0-000000000000067d
Error: PYTHON_API_ERROR: 'qso.VelocityAbsorption' [base.py:3654:get_loc]
Error: Context warning flag already exists

</pre>

The warning flags should not be recorded in the COperatorResultStore from the c++ exception (as it is the case now) but from the python process flow