feat: bump ddtrace to 4.x (breaking change)

[astuyve]

What does this PR do?

This library is dropping support for node14, so we can now upgrade ddtrace to 4.x

Motivation

Testing Guidelines

Additional Notes

Types of Changes

• Bug fix
• New feature
• Breaking change
• Misc (docs, refactoring, dependency upgrade, etc.)

Check all that apply

• This PR's description is comprehensive
• This PR contains breaking changes that are documented in the description
• This PR introduces new APIs or parameters that are documented and unlikely to change in the foreseeable future
• This PR impacts documentation, and it has been updated (or a ticket has been logged)
• This PR's changes are covered by the automated tests
• This PR collects user input/sensitive content into Datadog
• This PR passes the integration tests (ask a Datadog member to run the tests)

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (0fe831a) 82.11% compared to head (181e468) 82.11%.

❗ Current head 181e468 differs from pull request most recent head 7adccb0. Consider uploading reports for the commit 7adccb0 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #487   +/-   ##
=======================================
  Coverage   82.11%   82.11%           
=======================================
  Files          54       54           
  Lines        2186     2186           
  Branches      509      509           
=======================================
  Hits         1795     1795           
  Misses        329      329           
  Partials       62       62           

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[duncanista]

LGTM!