Implements otb::SARSensorModel

This issue is part of the SAR sensor models refactoring story (#2142 (closed))

Rationale

Implements a new class otb::SarSensorModel, that provides the same services as otb::SARSensorModelAdapters without relying on Ossim.

Analysis

The following methods should be implemented

• WorldToLineSample, WorldToLineSampleYZ, WorldToSatPositionAndVelocity: inverse sar geolocation, algorithm reference: Guide to ASAR geocoding (ref RSL-ASAR-GC-AD).
• LineSampleToWorld: direct sar geolocation (iterative use of WorldToLineSample).
• Deburst: perform a deburst operation, and return a vector of lines range of lines to keep in the image file.
• BurstExtraction: extration of one burst.
• DeburstAndConcatenate: perform a deburst and concatenation operation, and return the vector of lines and the vector of samples to keep in the image file.
• Overlap: estime the overlap area between two bursts and return the vector of lines and the vector of samples.

This can be done in different merge requests.

Acceptance criterions

• All re-implemented functionalities should be compared to the results of otb::SARSensorModelAdapters in tests. Note that at this point otb::SarSensorModel is not used in high level classes.
• The documentation is up to date.

Risk management

Risk	Likelihood	Impact	Action
Some functionalities of OSSIM are not easily re-implemented with GDAL or PROJ	medium	medium
There is a significant difference between OSSIM's and OTB's results	low	high