dg: util: added methods host_and_hih_workchain_for_imp() (workchain) and find_unsealed_process_nodes()

dg: submit: HostLoop: added kwargs to allow setting custom kkrparams (TODO: hand down to internal inputs provider, extras setter)

dg: inputs: InputsProvider_kkr_scf_wc: added kwargs param to allow setting custom kkrparams in pipeline (e.g., LMAX=3)

aiida-jutools demo: tmp workaround for masci-tools 8d75ba8 import to make aiida-jutools work on iffaiida to show @dolg aiida-jutools