upgrade `CacheControl` to use the more memory-efficient `SeparateBodyFileCache` #1776

Job	Run time
CI linters via Tox (lintreadme)	30s
CI linters via Tox (pydocstyle)	16s
CI tests via Tox (3, 8, lint)	32s
CI tests via Tox (3, 8, unit)	2m 59s
build_test_container	36s
CI tests via Tox (3, 8, mypy)	3m 2s
Confirm that codegen C++ passes tests with CWL	1m 6s
CI tests via Tox (3, 8, memleak)	1m 33s
Schema Salad release test	11m 33s
Confirm that codegen typescript passes tests with CWL	59s
CI tests via Tox (3, 9, lint)	36s
CI tests via Tox (3, 9, unit)	3m 0s
CI tests via Tox (3, 9, mypy)	3m 6s
CI tests via Tox (3, 9, memleak)	1m 36s
CI tests via Tox (3, 10, lint)	34s
CI tests via Tox (3, 10, unit)	2m 54s
CI tests via Tox (3, 10, mypy)	3m 4s
CI tests via Tox (3, 10, memleak)	1m 31s
CI tests via Tox (3, 11, lint)	29s
CI tests via Tox (3, 11, unit)	2m 37s
CI tests via Tox (3, 11, mypy)	2m 38s
CI tests via Tox (3, 11, memleak)	1m 32s
CI tests via Tox (3, 12, lint)	32s
CI tests via Tox (3, 12, unit)	3m 57s
CI tests via Tox (3, 12, mypy)	3m 17s
CI tests via Tox (3, 12, memleak)	1m 42s
	56m 11s

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