Remove redundant GitHub Actions unit-test job

[Copilot]

The GitHub Actions PR workflow was still running the full Python 3.9–3.14 unit-test matrix even though that coverage now lives in the IDDP/ADO PR pipeline. This trims the workflow down to build/package verification only while keeping PR coverage for sdist/wheel creation and twine check.

• Workflow scope

  • Renamed .github/workflows/python-package.yml from Build and Unit Tests to Build
  • Updated the header comment to reflect build-only responsibility
  • Clarified that unit tests, E2E, benchmarks, and SDL run in the IDDP/ADO pipeline

• GitHub Actions job cleanup

  • Removed the ci job entirely
  • Kept the existing build job unchanged:
    • python -m build --sdist --wheel
    • twine check
    • artifact upload
  • Preserved the existing pull_request trigger with no branch filter

• Related documentation alignment

  • Updated .Pipelines/CI-AND-RELEASE-PIPELINES.md to describe GitHub Actions as PR build verification only
  • Updated doc/python_version_support_policy.md so the supported-Python test matrix now points to the ADO pipeline files rather than the removed GitHub Actions pytest matrix

name: Build

on:
  pull_request:

jobs:
  build:
    name: Build package (sdist + wheel)

[Copilot]

Pull request overview

This PR updates the repository’s CI documentation and GitHub Actions PR workflow to reflect that unit/E2E/benchmark/SDL validation now happens in the IDDP/ADO pipelines, leaving GitHub Actions responsible only for PR-time package build and distribution metadata verification.

Changes:

• Removed the GitHub Actions unit-test matrix job, keeping only python -m build + twine check + artifact upload.
• Renamed the GitHub Actions workflow from “Build and Unit Tests” to “Build” and updated its header comment to match build-only scope.
• Updated pipeline/version-support documentation to point Python version test-matrix ownership to ADO pipeline files.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
doc/python_version_support_policy.md	Repoints “supported Python versions encoded in…” references from GitHub Actions to ADO pipeline files.
.Pipelines/CI-AND-RELEASE-PIPELINES.md	Updates narrative to describe GitHub Actions as PR package build verification (build + twine check) only.
.github/workflows/python-package.yml	Renames workflow and removes the unit-test matrix job, preserving build/package verification steps.

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