Replace uses of setup.py bdist_wheel and direct uses of python3 -m build

[mkoeppe]

This is the next step in the modernization of our use of build front ends for Python SPKGs, after #35618.

• New sage-dist-helper functions sdh_build_wheel, sdh_build_and_store_wheel (split out from pkgs/sagemath-doc-{html,pdf} #36730)
• New option --sdist-then-wheel for sdh_pip_install (and the new sdh_build*wheel functions)

By switching the packages sagemath_environment etc. from direct use of python3 -m build to the sdh_build_and_store_wheel script, it now falls back to --no-build-isolation when building with build isolation fails.

• This fixes sagemath_environment must respect --enable-system-site-packages #38190

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