Implement missing witness-api in test-tools

Michał Kudelarequested to merge
kudmich/witness-api into develop

Related MRs:

schemas: schemas!113 (closed)

helpy: helpy!86 (closed)

test-tools: test-tools!262 (closed)

hive: hive!1566 (closed)

Edited by Michał Kudela

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