[Port to 5.0.1 preview 2] Adding back ComputeFilesCopiedToPublishDir item group to fix wapproj compat bug#10978

mmitche merged 1 commit intodotnet:release/5.0.1xx-preview2dotnet/sdk:release/5.0.1xx-preview2from

MSLukeWest:dev/lukewest/5.0.1xx-preview2/FixWapprojCompatMSLukeWest/sdk:dev/lukewest/5.0.1xx-preview2/FixWapprojCompatCopy head branch name to clipboard