add util function `build_icat_metadata`
build_icat_metadata
will generate available icat metadata from a scan
return all available metadata from a scan fitting NXtomo definition of https://gitlab.esrf.fr/icat/hdf5-master-config/-/blob/88a975039694d5dba60e240b7bf46c22d34065a0/hdf5_cfg.xml
Edited by payno