chore: Replace deprecated gen_ai.tool.output with gen_ai.tool.call.result

[alexander-alderman-webb]

Description

See the deprecation in sentry-conventions:

https://github.com/getsentry/sentry-conventions/blob/991f82f1d830aadc4884d3be0e94fea7f57b0950/model/attributes/gen_ai/gen_ai__tool__output.json

Issues

Reminders

• Please add tests to validate your changes, and lint your code using uv run ruff.
• Add GH Issue ID & Linear ID (if applicable)
• PR title should use conventional commit style (feat:, fix:, ref:, meta:)
• For external contributors: CONTRIBUTING.md, Sentry SDK development docs, Discord community

[github-actions]

Codecov Results 📊

✅ 56868 passed | ❌ 1 failed | ⏭️ 2727 skipped | Total: 59596 | Pass Rate: 95.42% | Execution Time: 155m 26s

📊 Comparison with Base Branch

Metric	Change
Total Tests	📉 -80755
Passed Tests	📉 -76261
Failed Tests	📈 +1
Skipped Tests	📉 -4495

➕ New Tests (1)

View new tests

• test_spans_from_multiple_threads[propagate_scope=True]
  • File: tests.integrations.threading.test_threading
  • Status: ❌ Failing

❌ Failed Tests

test_spans_from_multiple_threads[propagate_scope=True]

File: tests.integrations.threading.test_threading
Suite: py3.9-common
Error: AssertionError: assert 'abfc3d750f13bcf4' == '804b78d216201eeb' - 804b78d216201eeb + abfc3d750f13bcf4

Stack Trace

tests/integrations/threading/test_threading.py:178: in test_spans_from_multiple_threads
    assert span["parent_span_id"] == outer_submit_spans[num].span_id
E   AssertionError: assert 'abfc3d750f13bcf4' == '804b78d216201eeb'
E     
E     - 804b78d216201eeb
E     + abfc3d750f13bcf4

✅ Patch coverage is 100.00%. Project has 2075 uncovered lines.
❌ Project coverage is 90.02%. Comparing base (dce9f1a) to head (9fd3e4c).

Coverage diff

@@            Coverage Diff             @@
##        master       #PR       +/-##
==========================================
- Coverage    90.35%    90.02%    -0.33%
==========================================
  Files          202       185       -17
  Lines        26551     20785     -5766
  Branches      9856      7188     -2668
==========================================
+ Hits         23988     18710     -5278
- Misses        2563      2075      -488
- Partials      1487      1206      -281

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