Allow restoring provider data at specific revision

Description

Goals:

• restore provider data at specific revision very quickly
• or a some datasets only

Implications:

• restore json-data
• restore Solr index

Questions:

• how to trigger operation? manually/by admin UI

To investigate:

• Solr documents versioning
  • https://lucene.apache.org/solr/guide/8_2/updating-parts-of-documents.html
  • http://yonik.com/solr/optimistic-concurrency/li