fix(asm): ensure new aspects does not raise exceptions if there is no context

[juanjux]

Description

Ensure the new aspect don't raise exceptions if there is no tx_map, instead just return the original function result.

Checklist

• Change(s) are motivated and described in the PR description
• Testing strategy is described if automated tests are not included in the PR
• Risks are described (performance impact, potential for breakage, maintainability)
• Change is maintainable (easy to change, telemetry, documentation)
• Library release note guidelines are followed or label changelog/no-changelog is set
• Documentation is included (in-code, generated user docs, public corp docs)
• Backport labels are set (if applicable)
• If this PR changes the public interface, I've notified @DataDog/apm-tees.

Reviewer Checklist

• Title is accurate
• All changes are related to the pull request's stated goal
• Description motivates each change
• Avoids breaking API changes
• Testing strategy adequately addresses listed risks
• Change is maintainable (easy to change, telemetry, documentation)
• Release note makes sense to a user of the library
• 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: juanjux/ensure-no-expections-on-aspects
Commit report: 4481c35
Test service: dd-trace-py

✅ 0 Failed, 109278 Passed, 3716 Skipped, 6m 7.24s Total duration (43m 49.8s time saved)

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 6.78%. Comparing base (7f679b3) to head (ad6a4d3).

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #9234       +/-   ##
===========================================
- Coverage   78.58%    6.78%   -71.81%     
===========================================
  Files        1277     1247       -30     
  Lines      120397   118617     -1780     
===========================================
- Hits        94611     8045    -86566     
- Misses      25786   110572    +84786     

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[pr-commenter]

Benchmarks

Benchmark execution time: 2024-05-10 21:02:15

Comparing candidate commit ad6a4d3 in PR branch juanjux/ensure-no-expections-on-aspects with baseline commit 7f679b3 in branch main.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 209 metrics, 9 unstable metrics.

[github-actions]

The backport to 2.9 failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-2.9 2.9
# Navigate to the new working tree
cd .worktrees/backport-2.9
# Create a new branch
git switch --create backport-9234-to-2.9
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 d0f56abd6053409b0f00fd7d8a77c199fa5ccd36
# Push it to GitHub
git push --set-upstream origin backport-9234-to-2.9
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-2.9

Then, create a pull request where the base branch is 2.9 and the compare/head branch is backport-9234-to-2.9.