Add optional PerfLab counter regression thresholds - #5293

Add optional PerfLab counter regression thresholds#5293

DrewScoggins wants to merge 4 commits into

dotnet:maindotnet/performance:mainfrom

DrewScoggins:copilot/crank-perflab-harmonizationDrewScoggins/performance-2:copilot/crank-perflab-harmonizationCopy head branch name to clipboard