Update GDAL version in superbuild (3.1.0)

Summary

Closes #2052 (closed)

Update GDAL version in Superbuild to 3.1.0 and update the information on minimum and superbuild version of GDAL in the Cookbook

Rationale

GDAL 3.1.0 has been released, see the release notes. Updating the version in superbuild means that :

• CI will use GDAL 3.1.0 in build using Superbuild to build dependencies.
• develop packages will use GDAL 3.1.0

The Cookbook documentation on GDAL is out-of-date, this MR also updates this documentation.

Additional notes

In future work we could take advantage of the support for raster of dimension > 2 introduced in GDAL 3.1.0.

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

Data/Baseline/OTB/Files/ioOtbVectorImageTestFORMOSAT2.1.txt

 ------ IMAGE --------
 Spacing [1, 1]
-Origin [0, 0]
+Origin [0.5, 0.5]
 Projection REF 
-GCP Projection GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0],UNIT["degree",0.0174532925199433],AUTHORITY["EPSG","4326"]]
+GCP Projection GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AXIS["Latitude",NORTH],AXIS["Longitude",EAST],AUTHORITY["EPSG","4326"]]
 GCP Count 4
 GCP[0] Id 1
 GCP[0] Info 
-GCP[0] Row 1
-GCP[0] Col 1
+GCP[0] Row 0.5
+GCP[0] Col 0.5
 GCP[0] X 1.05476
 GCP[0] Y 43.5896
 GCP[0] Z 0
 ----------------
 GCP[1] Id 2
 GCP[1] Info 
-GCP[1] Row 1
-GCP[1] Col 3000
+GCP[1] Row 0.5
+GCP[1] Col 2999.5
 GCP[1] X 1.41679
 GCP[1] Y 43.5219
 GCP[1] Z 0
 ----------------
 GCP[2] Id 3
 GCP[2] Info 
-GCP[2] Row 3000
-GCP[2] Col 3000
+GCP[2] Row 2999.5
+GCP[2] Col 2999.5
 GCP[2] X 1.32096
 GCP[2] Y 43.313
 GCP[2] Z 0
 ----------------
 GCP[3] Id 4
 GCP[3] Info 
-GCP[3] Row 3000
-GCP[3] Col 1
+GCP[3] Row 2999.5
+GCP[3] Col 0.5
 GCP[3] X 0.960095
 GCP[3] Y 43.3803
 GCP[3] Z 0