chore(aws_lambda): Remove transaction-based tracing

[sentrivana]

Closes https://linear.app/getsentry/issue/PY-2682/remove-transaction-based-tracing-from-aws-lambda

[linear-code]

PY-2682

[github-actions]

Codecov Results 📊

✅ 74137 passed | ❌ 1 failed | ⏭️ 3429 skipped | Total: 77567 | Pass Rate: 95.58% | Execution Time: 230m 6s

📊 Comparison with Base Branch

Metric	Change
Total Tests	📉 -60139
Passed Tests	📉 -56447
Failed Tests	📈 +1
Skipped Tests	📉 -3693

➕ New Tests (1)

View new tests

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

❌ Failed Tests

test_cache_spans_decorator

File: tests.integrations.django.test_cache_module
Suite: py3.14-django-v6.1
Error: tests/integrations/django/test_cache_module.py:282: in test_cache_spans_decorator assert not spans[0]["attributes"]["cache.hit"] E assert not True

Stack Trace

tests/integrations/django/test_cache_module.py:282: in test_cache_spans_decorator
    assert not spans[0]["attributes"]["cache.hit"]
E   assert not True

❌ Patch coverage is 0.00%. Project has 2291 uncovered lines.
❌ Project coverage is 90.06%. Comparing base (05de28f) to head (c810910).

Files with missing lines (1)

File	Patch %	Lines
sentry_sdk/integrations/aws_lambda.py	0.00%	⚠️ 30 Missing

Coverage diff

@@            Coverage Diff             @@
##        master       #PR       +/-##
==========================================
- Coverage    90.28%    90.06%    -0.22%
==========================================
  Files          193       185        -8
  Lines        25729     23039     -2690
  Branches      9496      8432     -1064
==========================================
+ Hits         23228     20748     -2480
- Misses        2501      2291      -210
- Partials      1432      1352       -80

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