Refactor FieldSearchSortIT to enable testing more complex cases

Description

In particular to enable testing multi-valued sorts, both at the root level and in nested documents. Needed for HSEARCH-3103.

Environment

None

Assignee

Yoann Rodière

Reporter

Yoann Rodière

Labels

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Suitable for new contributors

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Feedback Requested

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Components

Fix versions

Priority

Major
Configure