2.27.2: awscli uses deprecated pep517

[kloczek]

Describe the bug

Note from https://pypi.org/project/pep517/

Deprecated high-level
For now, pep517 also contains higher-level functions which install the build dependencies into a temporary environment and build a wheel/sdist using them. This is a rough implementation, e.g. it does not do proper build isolation. The PyPA build project is recommended as an alternative, although it’s still quite young in October 2020. This layer of functionality in pep517 is now deprecated, but won’t be removed for some time, as there is code relying on it.

Regression Issue

• Select this option if this issue appears to be a regression.

Expected Behavior

build should be used instead pep517.

Current Behavior

grep output

[tkloczko@pers-tkloczko aws-cli-2.27.2]$ grep -r pep517
grep: backends/__pycache__/pep517.cpython-310.pyc: binary file matches
pyproject.toml:build-backend = "pep517"
pyproject.toml:    # pep517 backend. When we explicitly address this change, we should be able to remove these filters.
requirements-dev-lock.txt:pep517==0.13.1 \
requirements-dev-lock.txt:    #   pep517
tests/backends/build_system/integration/test_build_system.py:            "Cannot import 'pep517'",
tests/backends/test_pep517.py:import backends.pep517
tests/backends/test_pep517.py:    sdist_name = backends.pep517.build_sdist(str(tmpdir), config_settings)
tests/backends/test_pep517.py:    assert unpacked_sdist.join("backends", "pep517.py").check()
tests/backends/test_pep517.py:    wheel_name = backends.pep517.build_wheel(str(tmpdir), config_settings)
tests/backends/test_pep517.py:    assert not unpacked_wheel_dir.join("backends", "pep517.py").check()
tests/backends/test_pep517.py:    wheel_name = backends.pep517.build_editable(str(tmpdir), config_settings)
tests/backends/test_pep517.py:    # backends.pep517.build_editable.
tests/backends/test_pep517.py:    dist_info_dirname = backends.pep517.prepare_metadata_for_build_wheel(
tests/backends/test_pep517.py:    dist_info_dirname = backends.pep517.prepare_metadata_for_build_editable(
tests/backends/test_pep517.py:    requirements = backends.pep517.get_requires_for_build_sdist(
tests/backends/test_pep517.py:    requirements = backends.pep517.get_requires_for_build_wheel(
tests/backends/test_pep517.py:    extras = set(backends.pep517.read_sdist_extras())
tests/backends/test_pep517.py:# snippet should alert us if we break anything in the pep517 module.

Reproduction Steps

Just grep across source tree.

Possible Solution

No response

Additional Information/Context

N/A

CLI version used

2.27.2

Environment details (OS name and version, etc.)

Linux x86/64