bug: get domain via id

[carlinmack]

❤️ Thank you for your contribution!

(Part of) Close inveniosoftware/invenio-app-rdm#2777

Description

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Relies on inveniosoftware/invenio-accounts#500

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[slint]

Suggested change

	domain = current_datastore.find_domain_by_id(id_)
	domain = current_datastore.find_domain(id_)

minor: see inveniosoftware/invenio-accounts#500 (comment), which would mean no need to change anything here.