Unpack WSGI environ into span attrs accessible in traces sampler

[sentrivana]

• Instead of passing wsgi_environ to the traces_sampler via sampling_context, unpack it into several span attributes and make those accessible in the traces_sampler.
• Add url.query for ASGI.

Part of https://github.com/getsentry/sentry-python/issues/3746

[codecov[bot]]

:x: 1716 Tests Failed:

Tests completed	Failed	Passed	Skipped
20056	1716	18340	4413

View the top 1 failed tests by shortest run time

> > ```python > tests.test_utils test_datetime_from_isoformat[2021-01-01T00:00:00.000000-00:00-expected_output4] > ``` > >

Stack Traces | 0.001s run time

> > > > > ```python > > tests/test_utils.py:109: in test_datetime_from_isoformat > > assert datetime_from_isoformat(input_str) == expected_output, input_str > > E NameError: name 'datetime_from_isoformat' is not defined > > ``` > >

View the full list of 2 :snowflake: flaky tests

> > ```python > tests.test_utils test_datetime_from_isoformat[2021-01-01T00:00:00.000000-0000-expected_output6] > ``` > > **Flake rate in main:** 58.06% (Passed 39 times, Failed 54 times) >

Stack Traces | 0.001s run time

> > > > > ```python > > tests/test_utils.py:109: in test_datetime_from_isoformat > > assert datetime_from_isoformat(input_str) == expected_output, input_str > > E NameError: name 'datetime_from_isoformat' is not defined > > ``` > >

tests.test_scope test_with_isolation_scope_data

Flake rate in main: 99.17% (Passed 2 times, Failed 238 times)

Stack Traces | 0.001s run time

> > ```python > tests/test_scope.py:387: in test_with_isolation_scope_data > assert scope._tags == {"before_isolation_scope": 1} > E AssertionError: assert {} == {'before_isolation_scope': 1} > E > E Right contains 1 more item: > E {'before_isolation_scope': 1} > E > E Full diff: > E + {} > E - { > E - 'before_isolation_scope': 1, > E - } > ```

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