Support for evaluating expressions involving document fields that are
arrays of multiple values, with the possibility of creating indexes
on them.
- Ensuring 'cont_in' and 'not_cont_in' operators uses indexes.
- Introducing a new function and/or operator that map to
  the new JSON_OVERLAPS() function (e.g. X overlaps Y).
- Introducing a new kind of indexed field: "array".
- Extending the index type with a CHAR(n) type for homogeneity.

RB:20311
Approved-by: Ashish Padiyar <ashish.padiyar@oracle.com>

Change-Id: I063225168a561e796e198a01633a0ab9cb41bad1