Use separate partials for iOS&tvOS instead of UnknowUnix in System.Diagnostics.Process#61871

MaximLipnin merged 4 commits intodotnet:maindotnet/runtime:mainfrom

MaximLipnin:use_separate_partials_for_ios_in_SDPMaximLipnin/runtime:use_separate_partials_for_ios_in_SDPCopy head branch name to clipboard