Update MuParser version in Superbuild to 2.3.2.
Closes #2083 (closed)
Closes #2071 (closed)
On CI the fast build will still use MuParser 2.2.6 while Superbuild based builds will use MuParser 2.3.2
The copyright owner is CNES and has signed the ORFEO ToolBox Contributor License Agreement.
Check before merging:
git diff develop... -U0 --no-color | clang-format-diff.py -p1 -i
