release-20.1:Backport!1571

Merged Andrey Vertiprahov requested to merge cherry-pick-23642170 into release-20.1

#1283 (closed) Add allowDiskUse to reportdatasources.

See merge request !3392 (merged)

(cherry picked from commit 23642170)

817f3795 Add allowDiskUse to reportdatasources.

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