Merge branch '50-adm_register_-_storage-apis-should-not-require-an-adm_job_t-argument' into 'main'

Resolve "ADM_register_*_storage APIs should not require an `ADM_job_t` argument"

This MR removes the necessity to provide a `job` argument when registering or manipulating an `adhoc_storage` or `pfs_storage` instance.

Closes #50

See merge request !34