Default to enable-cache: true on GitHub hosted runners #457

Job	Run time
test-setup-cache-auto	4s
test-setup-cache-dependency-glob	5s
test-setup-cache (true, ubuntu-latest)	8s
test-setup-cache-local	8s
test-setup-cache (true, selfhosted-ubuntu-arm64)	9s
test-setup-cache-requirements-txt	4s
test-setup-cache (false, ubuntu-latest)	5s
test-tilde-expansion-cache-dependency-glob	9s
test-setup-cache (false, selfhosted-ubuntu-arm64)	7s
test-tilde-expansion-cache-local-path	8s
test-setup-cache (auto, ubuntu-latest)	5s
test-setup-cache (auto, selfhosted-ubuntu-arm64)	7s
test-restore-cache-dependency-glob	7s
test-restore-cache	5s
test-restore-cache-auto	6s
test-restore-cache-requirements-txt	5s
test-restore-cache-local	9s
cleanup-tilde-expansion-tests	4s
	1m 55s

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