Implement IBuildEngine3 Yield/Reacquire for out-of-proc task host#13

Copilot wants to merge 5 commits intomainJanProvaznik/msbuild:mainfrom

copilot/add-yielding-in-outofproctaskhostJanProvaznik/msbuild:copilot/add-yielding-in-outofproctaskhostCopy head branch name to clipboard