Upgrade TIGRE plugin to TIGRE 2.6

[gfardell]

• Build binaries with 2.6
• Test with windows and linux
• Fix any CIL wrapping issues
• Update CIL recipe & readme

[gfardell]

TIGRE 2.6 appears to print more... will need to supress it as part of this issue.

TIGRE parameters
-----
Geometry parameters
Distance from source to detector (DSD) = 80000.0 mm
Distance from source to origin (DSO)= 20000.0 mm
-----
Detector parameters
Number of pixels (nDetector) = [  1 128]
Size of each pixel (dDetector) = [64. 64.] mm

[gfardell]

On a linux system without cudatoolkit installed:
ImportError: libcudart.so.10.2: cannot open shared object file: No such file or directory

Seems to have not pinned the expected version of conda's cudatoolkit package (expected 10.2)

# packages in environment at /home/tpc56154/miniconda3/envs/cil_tests:
#
# Name                    Version                   Build  Channel
cudatoolkit               11.8.0              h4ba93d1_13    conda-forge

Manually installing the correct version passes all unit tests, but with the verbose output mentioned above.

[gfardell]

closed by #1778