feat(tracing): Add `tracestate` header handling#1179

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lobsterkatie merged 7 commits intomasterfrom

kmclb-add-tracestate-header-handling

Sep 16, 2021

Commits on Sep 13, 2021

chore(tracing): Split tracing utils into separate module (#952)
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feat(tracing): Handle `tracestate` HTTP headers/correlation context envelope headers (#971)
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chore(tracing): Pre-lazy-tracestate cleanup (#1168)
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ref(tracing): Various tweaks to tracestate header handling (#1173)
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feat(tracing): Add user data/transaction name to tracestate value (#1177)
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feat(tracing): Add tracestate feature flag (#1182)
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fix(tracing): Break `transaction` / `span` circular references before garbage collection (#1184)
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committed