perf(sdk): store InstrumentationScope in Arc for cheaper tracer clones#3378

cijothomas merged 6 commits intoopen-telemetry:mainopen-telemetry/opentelemetry-rust:mainfrom

bryantbiggs:perf/avoid-scope-clone-per-processorbryantbiggs/opentelemetry-rust:perf/avoid-scope-clone-per-processorCopy head branch name to clipboard