[Metrics] Perform async Re-Aggregation when Spatial Attributes are dropped#3691

nikhilbhatia08 wants to merge 10 commits intoopen-telemetry:mainopen-telemetry/opentelemetry-cpp:mainfrom

nikhilbhatia08:async_re_aggregationnikhilbhatia08/opentelemetry-cpp:async_re_aggregationCopy head branch name to clipboard