Add real data to generic issue event fixture

[rjo100]

Follow up to #42454

Once we get some real data from profiling, clean up the event fixture data so it mirrors real-world data. Right now it's just structured copy/pasted data from other fixtures.

[rjo100]

Just got this in slack from pierre

{"detection_time":"2023-01-19T20:53:49.386332Z","event":{"environment":"production","event_id":"066f15fe1cd2406aaa7c6a07471d7aef","platform":"cocoa","project_id":1,"received":"2023-01-19T20:53:44Z","release":"com.apple.dt.xctest.tool@14.1+21501","stacktrace":{"frames":[{"function":"0x0","in_app":false},{"function":"0x0","in_app":false},{"function":"start_sim","in_app":false},{"function":"main","in_app":false,"package":"xctest"},{"function":"_XCTestMain","in_app":false,"package":"XCTestCore"},{"function":"-[XCTestDriver _runTests]","in_app":false,"package":"XCTestCore"},{"function":"-[XCTestObservationCenter _observeTestExecutionForBlock:]","in_app":false,"package":"XCTestCore"},{"function":"__25-[XCTestDriver _runTests]_block_invoke.184","in_app":false,"package":"XCTestCore"},{"function":"-[XCTExecutionWorker runWithError:]","in_app":false,"package":"XCTestCore"},{"function":"__72-[XCTExecutionWorker 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SentryProfilerSwiftTests.testMetricProfiler()","in_app":false,"package":"SentryTests"},{"function":"SentryProfilerSwiftTests.testMetricProfiler()","in_app":false,"package":"SentryTests"},{"function":"SentryProfilerSwiftTests.forceProfilerSample()","in_app":false,"package":"SentryTests"},{"function":"StringProtocol.appending\u003cA\u003e(A1)","in_app":false,"package":"Foundation"},{"function":"-[NSString stringByAppendingString:]","in_app":false,"package":"Foundation"},{"function":"_NSNewStringByAppendingStrings","in_app":false,"package":"Foundation"},{"function":"-[__NSCFString getCharacters:range:]","in_app":false,"package":"CoreFoundation"}]},"tags":{"device_classification":"unclassified","device_locale":"en_US","device_manufacturer":"Apple","device_model":"iPhone15,2","device_os_build_number":"21G115","device_os_name":"iOS","device_os_version":"16.1"},"timestamp":"2023-01-04T16:55:42.289Z","transaction":"0c7337f294294267928df30293008acb"},"evidence_display":[{"name":"Suspect function","value":"free_large","important":true},{"name":"Package","value":"libsystem_malloc.dylib","important":false}],"fingerprint":"2ec9f0faba66dc0b356aebf1621fd25e","id":"0c6d75ac-3969-41e0-bc4b-33c2ff7f3657","issue_title":"File I/O function called on main thread","subtitle":"Some Transaction","type":2000}

[rjo100]

Could be worth using in sentry/api/endpoints/issue_occurrence.py as well

[getsantry]

Routing to @getsentry/product-owners-issues for triage ⏲️