Initial cost estimate: 2 days
Initial contacts: @trylek, @ViktorHofer

Doing a test run using src\coreclr\runtest.cmd generates a TestRun.html and TestRun.xml file in artifacts\log. These filenames should also have OS/arch/build flavor so as to be unique w.r.t. different test runs, e.g.: TestRun_Windows_NT_x64_Checked.xml.