profiler: enable execution traces by default for go1.21+

[felixge]

What does this PR do?

Enable execution traces by default for go1.21+

Motivation

We've verified that this is safe and has no performance impact on our internal fleet. Let's allow all customers to enjoy this feature without having to figure out how to turn it on.

Reviewer's Checklist

• Changed code has unit tests for its functionality at or near 100% coverage.
• 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.

For Datadog employees:

• If this PR touches code that handles credentials of any kind, such as Datadog API keys, I've requested a review from @DataDog/security-design-and-guidance.
• This PR doesn't touch any of that.

Unsure? Have a question? Request a review!

[pr-commenter]

Benchmarks

Benchmark execution time: 2023-09-27 11:36:04

Comparing candidate commit 3cca387 in PR branch felix.geisendoerfer/PROF-8240-enable-execution-tracing-by-default with baseline commit 6a938b3 in branch main.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 40 metrics, 1 unstable metrics.

[nsrip-dd]

Thanks!

[felixge]

I'm waiting to merge this until another commit lands as I want to try out another merge queue thing for the document I'm writing about it.

[felixge]

/merge

[dd-devflow]

🚂 MergeQueue

Pull request added to the queue.

This build is going to start soon! (estimated merge in less than 9m)

you can cancel this operation by commenting your pull request with /merge -c!

[dd-devflow]

🚨 MergeQueue

not able to merge the branch in the target branch

Details

Error: PUT https://api.github.com/repos/DataDog/dd-trace-go/pulls/2226/merge: 405 5 of 5 required status checks are expected. []

FullStacktrace:
activity error (type: github.GithubService_MergePullRequest, scheduledEventID: 41, startedEventID: 42, identity: 1@github-worker-8496dd8b5f-jppjp@): PUT https://api.github.com/repos/DataDog/dd-trace-go/pulls/2226/merge: 405 5 of 5 required status checks are expected. [] (type: ErrorResponse, retryable: true)

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