fix: ignore deferred spans when delegating sampling decision#3209

lbeschastny wants to merge 3 commits intoopen-telemetry:mainopen-telemetry/opentelemetry-rust:mainfrom

lbeschastny:fix/psrent-based-sampler-with-deferred-tracelbeschastny/opentelemetry-rust:fix/psrent-based-sampler-with-deferred-traceCopy head branch name to clipboard