Add source-sample property

Closes #103

See merge request !246

# This is the 1st commit message:

Scan: rename existing 'distance' to 'sample_detector_distance'.

Because we are about to add the source_sample_distance. So make it more coherent,

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# fix 197033a4

Because we are about to add the source_sample_distance. So make it more coherent,

remove remaining 3d-xrd stuff

Closes #103

See merge request !245

close #103

Merge branch 'fix_single_frame' into '2.1'

See merge request !244

Fix single frame

See merge request !243

(cherry picked from commit bec26331)

ad38fbaa volume: single frame volume: clean output files that could be used.
8a23bf14 Volume: move _clean_output_data to public API
95cc01a3 VolumeSingleFrameBase: rename 'ignore_existing_files' to...
291b7f69 remove_existing_data_files: allow url to be None
7f826207 remove_existing_data_files: handle use case 'url' is None

Co-authored-by: payno <henri.payno@esrf.fr>

NXtomoScan: replace some deprecated code to tomoscan 'get_nexus_paths'

See merge request !242

doc.tutorials.publish_processed_data_to_data_portal: add a warning about esrf mounting points (like /gpfs/easy)

Add filter esrf mounting points

See merge request !241

tomoscan.esrf.scan.utils: improve from_bliss_original_file_to_raw to handle more use case (jazzy, easy...)

setup.cfg: fix requirements for python 3.8

See merge request !240

scan: replace usage of 'estimated_cor_frm_motor' by 'x_rotation_axis_pixel_position'

See merge request !239

deprecate 'estimated_cor_frm_motor'

Add 'from_bliss_original_file_to_raw' to tomoscan.esrf.scan.utils

See merge request !238

Doc: add a tutorial on how to publish reconstructed volume to drac / icat

See merge request !237