Replace the per-trace sampling state lock with compare-and-set - #13042

Replace the per-trace sampling state lock with compare-and-set#13042

dougqh wants to merge 2 commits into

dougqh/child-trace-source-routingDataDog/dd-trace-java:dougqh/child-trace-source-routingfrom

dougqh/ptags-sampling-state-cas-stackedDataDog/dd-trace-java:dougqh/ptags-sampling-state-cas-stackedCopy head branch name to clipboard