[release/7.0] Decommit memory before returning to the region_allocator#81295

Merged

carlossanlop merged 1 commit intodotnet:release/7.0from cshung:backport/pr-80640-to-release/7.0

Feb 9, 2023

+85-41

Commits on Jan 27, 2023

Avoid using a null heap to decommit the mark array (dotnet#80640 )
cshung
committed