chore(llmobs): remove python 3.7 tests from test suite

[ncybul]

Removed LLMObs and related integration tests run with Python version 3.7.

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

[github-actions]

CODEOWNERS have been resolved as:

riotfile.py                                                             @DataDog/apm-python

[datadog-dd-trace-py-rkomorn]

Datadog Report

Branch report: nicole-cybul/remove-3.7-from-test-suite
Commit report: adff26f
Test service: dd-trace-py

✅ 0 Failed, 130 Passed, 1468 Skipped, 4m 38.4s Total duration (36m 10.19s time saved)

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-01-24 22:06:30

Comparing candidate commit adff26f in PR branch nicole-cybul/remove-3.7-from-test-suite with baseline commit 3167f00 in branch main.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 394 metrics, 2 unstable metrics.