ci: set CMAKE_BUILD_PARALLEL_LEVEL for mac builds

[taegyunkim]

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:

.github/workflows/build_python_3.yml                                    @DataDog/python-guild @DataDog/apm-core-python
pyproject.toml                                                          @DataDog/python-guild

[datadog-dd-trace-py-rkomorn]

Datadog Report

Branch report: taegyunkim/build-parallel
Commit report: 58ef6e5
Test service: dd-trace-py

✅ 0 Failed, 87 Passed, 1468 Skipped, 3m 57.32s Total duration (35m 22.76s time saved)

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-01-06 20:55:15

Comparing candidate commit 58ef6e5 in PR branch taegyunkim/build-parallel with baseline commit 81208cd in branch main.

Found 0 performance improvements and 3 performance regressions! Performance is the same for 391 metrics, 2 unstable metrics.

scenario:iast_aspects-ospathdirname_aspect

• 🟥 execution_time [+390.852ns; +456.887ns] or [+10.712%; +12.521%]

scenario:iast_aspects-ospathsplit_aspect

• 🟥 execution_time [+273.265ns; +342.407ns] or [+7.107%; +8.905%]

scenario:iast_aspects-replace_aspect

• 🟥 execution_time [+547.409ns; +630.466ns] or [+8.174%; +9.414%]