Introduce calculated field infrastructure across the pivot table stack:
cache (ScDPCache::CalculatedField), filtered cache, data sources
(ScSheetDPData, ScDatabaseDPData, ScDPGroupTableData), result
calculation (ScDPTabRes), dimension supplier (ScDPSource), and
save/restore (ScDPDimCalcSaveData). Add new ocDPFieldName opcode
and formula compiler support for pivot field references.
Handle OOXML import/export of pivot calculated fields.
Change-Id: I42d094122d547b8ee9a2b63f809bdb13127f8f01
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/197913
Tested-by: Jenkins
Reviewed-by: Balazs Varga <balazs.varga@collabora.com>