Include location and fileName with uploaded Trace

[iampatbrown]

💬 Context

Including the location and file name will enable linking from tests in Buildkite Test Analytics to their associated code.

📝 Notes

Example from RSpec collector

"location": "./spec/models/analytics/upload_spec.rb:24",
"file_name": "./spec/models/analytics/upload_spec.rb",

This information isn't easily obtained from XCTest. Failures will include the location of the test failure, however, this isn't exactly what we're after. We want the location of the test method for all tests.