Use Horner's method in SarCalibration

Summary

Rebase of !755 (closed) by @lhermitte on the release-7.4 branch

The baseline of the affected calibration tests have been updated.

Copyright

The copyright owners are CS Group FRANCE (@lhermitte commits) and CNES (my commits) and have signed the ORFEO ToolBox Contributor License Agreement.

---

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

changed milestone to %7.4.0

added refactoring label

assigned to @ctraizet

changed the description

mentioned in commit 5c0b7ae9

merged

mentioned in merge request !755 (closed)

mentioned in issue #2209 (closed)