fix(asm): standalone missing tag [backport 2.15]

[github-actions]

Backport 832301c from #11452 to 2.15.

This fix resolves a possibly missing ASM standalone tag on root spans.
It was only detected previously on uwsgi on nightly system tests.

• ensure that all root spans are tagged.

APPSEC-55222

Checklist

• PR author has checked that all the criteria below are met
• The PR description includes an overview of the change
• The PR description articulates the motivation for the change
• The change includes tests OR the PR description describes a testing strategy
• The PR description notes risks associated with the change, if any
• Newly-added code is easy to change
• The change follows the library release note guidelines
• The change includes or references documentation updates if necessary
• Backport labels are set (if applicable)

Reviewer Checklist

• Reviewer has checked that all the criteria below are met
• Title is accurate
• All changes are related to the pull request's stated goal
• Avoids breaking API changes
• Testing strategy adequately addresses listed risks
• Newly-added code is easy to change
• Release note makes sense to a user of the library
• If necessary, author has acknowledged and discussed the performance implications of this PR as reported in the benchmarks PR comment
• Backport labels are set in a manner that is consistent with the release branch maintenance policy

[datadog-dd-trace-py-rkomorn]

Datadog Report

Branch report: backport-11452-to-2.15
Commit report: f7b698d
Test service: dd-trace-py

✅ 0 Failed, 910 Passed, 376 Skipped, 19m 44.77s Total duration (16m 43.56s time saved)

[pr-commenter]

Benchmarks

Benchmark execution time: 2024-11-21 16:47:01

Comparing candidate commit f7b698d in PR branch backport-11452-to-2.15 with baseline commit 01215f1 in branch 2.15.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 214 metrics, 2 unstable metrics.