Master Data group entities - change certain fields from flattened to nested

Refer to the Master list here (shared by @gehrmann )

https://community.opengroup.org/osdu/data/data-definitions/-/blob/master/E-R/IndexerHintsReport.md

Propose to change indexing for the set of fields from "flattened" to "nested".

Schema-indexing-flattened-to-nested.xlsx

This is linked to issue of searching data. osdu/platform/system/search-service#57 (closed)

cc - @ChrisZhang for information