chore: Make all tests use span streaming

[sentrivana]

• add trace_lifecycle="stream" to all tests that set a traces_sample_rate or traces_sampler
• remove more duplicated tests
• switch all tracing API in tests to span streaming

[github-actions]

Codecov Results 📊

✅ 67083 passed | ❌ 1 failed | ⏭️ 3304 skipped | Total: 70388 | Pass Rate: 95.3% | Execution Time: 214m 2s

📊 Comparison with Base Branch

Metric	Change
Total Tests	📉 -68578
Passed Tests	📉 -64752
Failed Tests	📈 +1
Skipped Tests	📉 -3827

➕ New Tests (1)

View new tests

• test_cache_spans_item_size
  • File: tests.integrations.django.test_cache_module
  • Status: ❌ Failing

❌ Failed Tests

test_cache_spans_item_size

File: tests.integrations.django.test_cache_module
Suite: py3.14-django-v6.1
Error: tests/integrations/django/test_cache_module.py:525: in test_cache_spans_item_size assert not spans[0]["attributes"]["cache.hit"] E assert not True

Stack Trace

tests/integrations/django/test_cache_module.py:525: in test_cache_spans_item_size
    assert not spans[0]["attributes"]["cache.hit"]
E   assert not True

✅ Patch coverage is 100.00%. Project has 2720 uncovered lines.
❌ Project coverage is 87.83%. Comparing base (c24a218) to head (69718a5).

Coverage diff

@@            Coverage Diff             @@
##        master       #PR       +/-##
==========================================
- Coverage    90.21%    87.83%    -2.38%
==========================================
  Files          193       181       -12
  Lines        25790     22342     -3448
  Branches      9532      8120     -1412
==========================================
+ Hits         23265     19622     -3643
- Misses        2525      2720      +195
- Partials      1432      1239      -193

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