Use a data-only image for cache in CI. #2154

Job	Run time
Check GitHub Organization	1s
(ubuntu-22.04) Pip 20 TOXENV=py311	3m 30s
(ubuntu-22.04) Pip 22_3_1 TOXENV=py311	3m 31s
(ubuntu-22.04) Pip 23_1_2 TOXENV=py311	3m 29s
(ubuntu-22.04) Pip 23_2 TOXENV=py312	3m 30s
(macos-12) Pip 20 TOXENV=py27	3m 23s
(ubuntu-22.04) Pip 20 TOXENV=py27	3m 29s
(ubuntu-20.04) Pip 20 TOXENV=py35	3m 30s
(macos-12) Pip 20 TOXENV=py311-integration	3m 26s
(ubuntu-22.04) Pip 20 TOXENV=py311-integration	3m 30s
(ubuntu-22.04) Pip 22_3_1 TOXENV=py311-integration	3m 26s
(ubuntu-22.04) Pip 23_1_2 TOXENV=py311-integration	3m 32s
(macos-12) Pip 23_2 TOXENV=py312-integration	3m 28s
(ubuntu-22.04) Pip 23_2 TOXENV=py312-integration	3m 29s
(PyPy 2.7) Pip 20 TOXENV=pypy27	3m 29s
(PyPy 3.9) Pip 20 TOXENV=pypy39	3m 28s
(PyPy 3.9) Pip 22_3_1 TOXENV=pypy39	3m 28s
(PyPy 3.9) Pip 23_1_2 TOXENV=pypy39	3m 29s
TOXENV=format-check,typecheck,vendor-check,package -- --additional-format sdist --additional-form...	3m 28s
(macos-12) Pip 20 TOXENV=py27-integration	3m 25s
(ubuntu-22.04) Pip 20 TOXENV=py27-integration	3m 28s
(ubuntu-22.04) Pip 22_3_1 TOXENV=py37-integration	3m 30s
(ubuntu-22.04) Pip 23_1_2 TOXENV=py37-integration	3m 14s
(PyPy 2.7) Pip 20 TOXENV=pypy27-integration	3m 29s
(PyPy 3.9) Pip 20 TOXENV=pypy39-integration	3m 29s
(PyPy 3.9) Pip 22_3_1 TOXENV=pypy39-integration	3m 30s
(PyPy 3.9) Pip 23_1_2 TOXENV=pypy39-integration	3m 29s
Gather Final Status	1s
	1h 30m 11s

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