node-integration-tests: port trace semantics suites to span streaming

先从父 issue 中的移植方案开始，然后检查列出的 tracing/* 和 public-api/* suites 及其 -streamed 对应项。将指定的 suites 移植到 span streaming，撤回提到的对应项，并让 tracing/sampling-static 和 public-api/beforeSendSpan-static 保持在 static pin 上。当列出的 integration suites 覆盖 span streaming 下的 sampling、propagation、span linking 和 public API 行为时，即表示完成。

Follow the porting recipe in the parent issue.

Sampling, DSC, envelope headers and span linking. These suites assert on envelope headers and trace propagation rather than on instrumentation output, so they are the ones most likely to expose a real product bug rather than a test rewrite.

Suites

• Envelope headers and DSC: tracing/envelope-header/* (7 dirs), tracing/dsc-txn-name-update, tracing/double-baggage/* (3 dirs), tracing/meta-tags, tracing/meta-tags-twp, tracing/meta-tags-twp-errors
• Sampling: tracing/sampling-static, tracing/sample-rate-propagation/* (4 dirs), tracing/sample-rand-propagation, tracing/no-parent-span-client-report
• Trace lifetime: tracing/continueTrace, tracing/startNewTrace, tracing/traceid-recycling, tracing/traceid-recycling-with-spans
• Span shaping: tracing/linking, tracing/maxSpans, tracing/tracer-start-active-span-error
• Public API span surface: public-api/startSpan/* (7 dirs), public-api/beforeSendSpan-static, public-api/bindScopeToEmitter, public-api/setMeasurement, public-api/scopes/*

Twins to fold back

tracing/sampling-streamed, tracing/ignoreSpans-streamed/*, public-api/beforeSendSpan-streamed, context-streamed/*, and the 6 public-api/startSpan/*-streamed dirs.

Keep static trace lifecycle coverage

This is the group that owns the guard. Keep tracing/sampling-static and public-api/beforeSendSpan-static on the static pin. Everything else moves.