What does this PR do?

This PR adds support for collecting all logs generated by testing.T from both t.common.output slice or the t.common.chatty chatty printer.

All logs extracted are sent to the backend and linked to the specific test as seen in the screenshot:

Motivation

We are lacking about context information from a test execution. By collecting the logs created by the test we get more information to show to the customer in case of failures.

Reviewer's Checklist

• Changed code has unit tests for its functionality at or near 100% coverage.
• System-Tests covering this feature have been added and enabled with the va.b.c-dev version tag.
• There is a benchmark for any new code, or changes to existing code.
• If this interacts with the agent in a new way, a system test has been added.
• New code is free of linting errors. You can check this by running golangci-lint run locally.
• Add an appropriate team label so this PR gets put in the right place for the release notes.
• Non-trivial go.mod changes, e.g. adding new modules, are reviewed by @DataDog/dd-trace-go-guild.

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