feat: introduce rust_tracing integration

[matt-codecov]

this PR introduces a new integration that allows traces to descend into code in Rust native extensions by hooking into Rust's popular tracing framework. it relies on the Rust native extension using pyo3-python-tracing-subscriber, a crate i recently published under Sentry, to expose a way for the Python SDK to hook into tracing.

in this screenshot, the transaction was started in Python but the rest of the span tree reflects the structure and performance of a naive fibonacci generator in Rust.

i have a sentry-docs branch with new docs for the integration pretty much ready to go. just want to get this merged and then add a working example to pyo3-python-tracing-subscriber to link to first

[codecov]

❌ 3 Tests Failed:

Tests completed	Failed	Passed	Skipped
110	3	107	0

View the full list of 3 ❄️ flaky tests

tests.integrations.aws_lambda.test_aws test_non_dict_event[python3.8-\n            [\n                {\n                    "headers": {\n                        "Host": "x1.io",\n                        "X-Forwarded-Proto": "https"\n                    },\n                    "httpMethod": "GET",\n                    "path": "/path1",\n                    "queryStringParameters": {\n                        "done": "false"\n                    },\n                    "dog": "Maisey"\n                },\n                {\n                    "headers": {\n                        "Host": "x2.io",\n                        "X-Forwarded-Proto": "http"\n                    },\n                    "httpMethod": "POST",\n                    "path": "/path2",\n                    "queryStringParameters": {\n                        "done": "true"\n                    },\n                    "dog": "Charlie"\n                }\n            ]\n            -True-2]

Flake rate in main: 40.48% (Passed 25 times, Failed 17 times)

Stack Traces | 0.237s run time

.../integrations/aws_lambda/test_aws.py:513: in test_non_dict_event
    (
E   ValueError: not enough values to unpack (expected 2, got 1)

tests.integrations.aws_lambda.test_aws test_non_dict_event[python3.10-\n            [\n                {\n                    "headers": {\n                        "Host": "x1.io",\n                        "X-Forwarded-Proto": "https"\n                    },\n                    "httpMethod": "GET",\n                    "path": "/path1",\n                    "queryStringParameters": {\n                        "done": "false"\n                    },\n                    "dog": "Maisey"\n                },\n                {\n                    "headers": {\n                        "Host": "x2.io",\n                        "X-Forwarded-Proto": "http"\n                    },\n                    "httpMethod": "POST",\n                    "path": "/path2",\n                    "queryStringParameters": {\n                        "done": "true"\n                    },\n                    "dog": "Charlie"\n                }\n            ]\n            -True-2]

Flake rate in main: 37.50% (Passed 20 times, Failed 12 times)

Stack Traces | 0.238s run time

.../integrations/aws_lambda/test_aws.py:513: in test_non_dict_event
    (
E   ValueError: not enough values to unpack (expected 2, got 1)

tests.integrations.aws_lambda.test_aws test_non_dict_event[python3.9-\n            [\n                {\n                    "headers": {\n                        "Host": "x1.io",\n                        "X-Forwarded-Proto": "https"\n                    },\n                    "httpMethod": "GET",\n                    "path": "/path1",\n                    "queryStringParameters": {\n                        "done": "false"\n                    },\n                    "dog": "Maisey"\n                },\n                {\n                    "headers": {\n                        "Host": "x2.io",\n                        "X-Forwarded-Proto": "http"\n                    },\n                    "httpMethod": "POST",\n                    "path": "/path2",\n                    "queryStringParameters": {\n                        "done": "true"\n                    },\n                    "dog": "Charlie"\n                }\n            ]\n            -True-2]

Flake rate in main: 37.93% (Passed 18 times, Failed 11 times)

Stack Traces | 0.278s run time

.../integrations/aws_lambda/test_aws.py:513: in test_non_dict_event
    (
E   ValueError: not enough values to unpack (expected 2, got 1)

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[matt-codecov]

CI seems hung, not sure if that is my fault somehow or what

[antonpirker]

Looks very cool. I added some minor requests.

[antonpirker]

After some rework, this integration is now ready to be merged!