switch to hynek build and inspect

[TimMonko]

This pull request updates the GitHub Actions workflow to improve the build and deployment process for the package. The main changes are the introduction of a dedicated build and inspection job and the simplification of the deployment step to use pre-built artifacts.

CI/CD workflow improvements:

• Added a new build-and-inspect-package job that checks out the code and uses the hynek/build-and-inspect-python-package action to build and inspect the package. (.github/workflows/test_and_deploy.yml)
• Updated the deploy job to depend on both the test and build-and-inspect-package jobs, ensuring that deployment only happens after successful testing and package inspection. (.github/workflows/test_and_deploy.yml)
• Simplified the deployment process by removing redundant build steps and instead downloading the pre-built package artifact for publishing to PyPI. (.github/workflows/test_and_deploy.yml)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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