test: Run tracing tests in stream mode

[sentrivana]

Adapt tests of integrations we've already fully ported to span streaming so that they actually use span streaming everytime they define a traces_sampler or traces_sample_rate. Otherwise, they're implicitly using static tracing, and they'll break the moment we remove it.

[github-actions]

Codecov Results 📊

✅ 117009 passed | ⏭️ 5544 skipped | Total: 122553 | Pass Rate: 95.48% | Execution Time: 391m 19s

📊 Comparison with Base Branch

Metric	Change
Total Tests	📉 -14970
Passed Tests	📉 -13404
Failed Tests	—
Skipped Tests	📉 -1566

All tests are passing successfully.

✅ Patch coverage is 100.00%. Project has 2263 uncovered lines.
✅ Project coverage is 90.42%. Comparing base (base) to head (head).

Coverage diff

@@            Coverage Diff             @@
##          main       #PR       +/-##
==========================================
+ Coverage    90.28%    90.42%    +0.14%
==========================================
  Files          193       185        -8
  Lines        25682     23612     -2070
  Branches      9468      8664      -804
==========================================
+ Hits         23184     21349     -1835
- Misses        2498      2263      -235
- Partials      1442      1373       -69

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