nuget in /tests/Microsoft.Graph.DotnetCore.Core.Test for coverlet.collector, coverlet.msbuild, coverlet.collector, coverlet.msbuild - Update #1378594998

nuget in /tests/Microsoft.Graph.DotnetCore.Core.Test for coverlet.collector, coverlet.msbuild, coverlet.collector, coverlet.msbuild - Update #1378594998 #909