SSDM-13623: Fixing property assignment flow to newly created sample type; Updating docs. PyBIS-1.35.6rc2

SSDM-13524: added tests for assigning new property types to samples, collections, datasets; Added test to check if assigning new property types are not assignable for material types

SSDM-12812: Added PropertyReformatter to reformat properties of type TIMESTAMP before upload to OpenBis. Added reformatter flow to sample, material, dataset and experiment objects

SSDM-13443: Added functionality to use PersonalAccessToken object in set_token method. Reformatted code