Fix long test durations

[xavdid]

Why?

After #1853, I noticed tests got really slow both locally in CI.

Before:

After:

With this fix:

Claude traced it to the timeout value, which doesn't set a maximum amount of time to wait, but a minimum. So all affected tests were taking exactly 30 seconds instead of "up to":

30.01s teardown tests/test_integration.py::TestIntegration::test_measures_stripe_client_telemetry[trio]
30.01s teardown tests/test_integration.py::TestIntegration::test_passes_client_telemetry_when_enabled
30.00s teardown tests/test_integration.py::TestIntegration::test_async_httpx_stream[trio-httpx]
30.00s teardown tests/test_integration.py::TestIntegration::test_async_raw_request_unretryable[asyncio-httpx]
30.00s teardown tests/test_integration.py::TestIntegration::test_async_raw_request_success[trio-httpx]
30.00s teardown tests/test_integration.py::TestIntegration::test_async_raw_request_retries[trio-httpx]
30.00s teardown tests/test_integration.py::TestIntegration::test_hits_proxy_through_default_http_client
30.00s teardown tests/test_integration.py::TestIntegration::test_async_raw_request_retries[asyncio-httpx]
30.00s teardown tests/test_integration.py::TestIntegration::test_hits_proxy_through_custom_client
30.00s teardown tests/test_integration.py::TestIntegration::test_async_raw_request_unretryable[trio-httpx]
30.00s teardown tests/test_integration.py::TestIntegration::test_async_httpx_stream_error[asyncio-aiohttp]
30.00s teardown tests/test_integration.py::TestIntegration::test_hits_api_base
30.00s teardown tests/test_integration.py::TestIntegration::test_async_raw_request_success[asyncio-httpx]
30.00s teardown tests/test_integration.py::TestIntegration::test_async_raw_request_success[asyncio-aiohttp]
30.00s teardown tests/test_integration.py::TestIntegration::test_async_httpx_stream[asyncio-aiohttp]
30.00s teardown tests/test_integration.py::TestIntegration::test_async_httpx_stream_error[trio-httpx]
30.00s teardown tests/test_integration.py::TestIntegration::test_measures_stripe_client_telemetry[asyncio]
30.00s teardown tests/test_integration.py::TestIntegration::test_async_raw_request_unretryable[asyncio-aiohttp]
30.00s teardown tests/test_integration.py::TestIntegration::test_async_httpx_stream[asyncio-httpx]
30.00s teardown tests/test_integration.py::TestIntegration::test_async_httpx_stream_error[asyncio-httpx]
30.00s teardown tests/test_integration.py::TestIntegration::test_async_raw_request_retries[asyncio-aiohttp]
0.71s call     tests/test_exports.py::test_can_import_namespaced_resource
0.67s call     tests/test_exports.py::test_can_import_deeply_namespaced_service
0.66s call     tests/test_exports.py::test_can_import_namespaced_service
0.52s call     tests/test_integration.py::TestIntegration::test_async_raw_request_retries[trio-httpx]
0.52s call     tests/test_integration.py::TestIntegration::test_async_raw_request_retries[asyncio-httpx]
...

I don't think this will reintroduce the flakiness (claude says the fix for that was defaulting to HTTP/1.1) but I'm also not super sure.

What?

• reduced the timeout of our test handler