fix(tracing): Make functions_to_trace work when streaming spans

[sentrivana]

functions_to_trace is an alternative to decorating functions with @trace. It doesn't support span streaming.

[github-actions]

Codecov Results 📊

✅ 130727 passed | ⏭️ 7126 skipped | Total: 137853 | Pass Rate: 94.83% | Execution Time: 466m 6s

📊 Comparison with Base Branch

Metric	Change
Total Tests	📈 +102
Passed Tests	📈 +102
Failed Tests	—
Skipped Tests	—

All tests are passing successfully.

✅ Patch coverage is 100.00%. Project has 2501 uncovered lines.
✅ Project coverage is 90.28%. Comparing base (611584b) to head (351b37e).

Coverage diff

@@            Coverage Diff             @@
##        master       #PR       +/-##
==========================================
+ Coverage    90.25%    90.28%    +0.03%
==========================================
  Files          193       193         —
  Lines        25729     25731        +2
  Branches      9496      9496         —
==========================================
+ Hits         23221     23230        +9
- Misses        2508      2501        -7
- Partials      1434      1431        -3

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