ci: Add aiohttp to uv typing group

[alexander-alderman-webb]

Description

Add aiohttp to the typing dependency group and fix the resulting mypy errors.

Resolve

sentry_sdk/integrations/aiohttp.py:313: error: Cannot assign to a method  [method-assign]
sentry_sdk/integrations/aiohttp.py:353: error: Cannot assign to a method  [method-assign]
sentry_sdk/integrations/aiohttp.py:366: error: Cannot assign to a method  [method-assign]

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 📊

✅ 130596 passed | ⏭️ 7110 skipped | Total: 137706 | Pass Rate: 94.84% | Execution Time: 465m 17s

📊 Comparison with Base Branch

Metric	Change
Total Tests	📈 +32305
Passed Tests	📈 +31674
Failed Tests	—
Skipped Tests	📈 +631

All tests are passing successfully.

✅ Patch coverage is 100.00%. Project has 2502 uncovered lines.

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