Description

Make sure that none of the Flavors need reorganization before import - there were three of them.

Some information is present in the import testing scripts bids_FullPipelineTest but not in the import workflow. This information needs to be moved to the import workflow, being able to call this with a flavor option, e.g. bSiemensMultiPLD. Also, some other cases that move M0 to M0PERev can be automated by detecting the inverted phase encoding direction, instead of hardcoding, e.g. Philips_PCASL_3DGRASE_R5.4_TopUp.
For the case of Siemens_PCASL_3DGRASE_vascular there also seems things that can be generalized, as deleting redundant data always needs to be done, and xASL_bids_MergeNIfTI also always should run (which by default would detect that there is nothing to merge).

Also, the import workflow should simply call an iteration of ExploreASL, now the scripts are a bit convoluted and more difficult to debug.

Release notes

Required: summarize the changes for the release notes here