Fix httpx tests

[sl0thentr0py]

No description provided.

[codecov]

❌ 622 Tests Failed:

Tests completed	Failed	Passed	Skipped
19684	622	19062	4424

View the top 3 failed tests by shortest run time

tests.integrations.opentelemetry.test_span_processor test_on_start_transaction

Stack Traces | 0.001s run time

.../integrations/opentelemetry/test_span_processor.py:289: in test_on_start_transaction
    fake_start_transaction,
.../hostedtoolcache/Python/3.7.17....../x64/lib/python3.7/unittest/mock.py:1307: in __enter__
    original, local = self.get_original()
.../hostedtoolcache/Python/3.7.17....../x64/lib/python3.7/unittest/mock.py:1281: in get_original
    "%s does not have the attribute %r" % (target, name)
E   AttributeError: <module 'sentry_sdk.integrations.opentelemetry.span_processor' from '.../integrations/opentelemetry/span_processor.py'> does not have the attribute 'start_transaction'

tests.integrations.opentelemetry.test_span_processor test_on_start_transaction

Stack Traces | 0.002s run time

.../integrations/opentelemetry/test_span_processor.py:287: in test_on_start_transaction
    with mock.patch(
.../hostedtoolcache/Python/3.12.7....../x64/lib/python3.12/unittest/mock.py:1463: in __enter__
    original, local = self.get_original()
.../hostedtoolcache/Python/3.12.7....../x64/lib/python3.12/unittest/mock.py:1436: in get_original
    raise AttributeError(
E   AttributeError: <module 'sentry_sdk.integrations.opentelemetry.span_processor' from '.../integrations/opentelemetry/span_processor.py'> does not have the attribute 'start_transaction'

tests.integrations.opentelemetry.test_span_processor test_on_start_transaction

Stack Traces | 0.002s run time

.../integrations/opentelemetry/test_span_processor.py:287: in test_on_start_transaction
    with mock.patch(
.../hostedtoolcache/Python/3.10.15....../x64/lib/python3.10/unittest/mock.py:1447: in __enter__
    original, local = self.get_original()
.../hostedtoolcache/Python/3.10.15....../x64/lib/python3.10/unittest/mock.py:1420: in get_original
    raise AttributeError(
E   AttributeError: <module 'sentry_sdk.integrations.opentelemetry.span_processor' from '.../integrations/opentelemetry/span_processor.py'> does not have the attribute 'start_transaction'

To view more test analytics, go to the Test Analytics Dashboard
Got feedback? Let us know on Github

[sentrivana]

Lgtm. Just one small q.

[sentrivana]

Do you know why we were expecting to not propagate in the original version of this test case? The updated behavior is what I'd have expected to always be the case

[sl0thentr0py]

was part of this change
#3070
and I believe this was an unintended side effect of that change...

but now we fixed the span without transaction problem another way with only_if_parent and this is the desired twp behaviour.