Update MuParser in Superbuild

Summary

Update MuParser version in Superbuild to 2.3.2.

Closes #2083 (closed)

Closes #2071 (closed)

Tests

On CI the fast build will still use MuParser 2.2.6 while Superbuild based builds will use MuParser 2.3.2

Copyright

The copyright owner is CNES and has signed the ORFEO ToolBox Contributor License Agreement.

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Check before merging:

• All discussions are resolved
• At least 2 votes from core developers, no vote.
• The feature branch is (reasonably) up-to-date with the base branch
• Dashboard is green
• Copyright owner has signed the ORFEO ToolBox Contributor License Agreement
• Optionally, run git diff develop... -U0 --no-color | clang-format-diff.py -p1 -i on latest changes and commit