ENH: Adding SAR filtering module with a SAR deburst filter

Modules/Filtering/SAR/CMakeLists.txt

Modules/Filtering/SAR/include/otbSarDeburstImageFilter.h

Modules/Filtering/SAR/include/otbSarDeburstImageFilter.txx

Modules/Filtering/SAR/otb-module.cmake

Modules/Filtering/SAR/test/CMakeLists.txt

Modules/Filtering/SAR/test/otbSARTestDriver.cxx

Modules/Filtering/SAR/test/otbSarDeburstFilterTest.cxx