Remove caches from CI #145

Job	Run time
python-lint	12s
gateway-build	16s
runner-test	26s
python-test (macos-latest, 3.8)	2m 4s
python-test (macos-latest, 3.9)	1m 52s
python-test (macos-latest, 3.10)	1m 56s
python-test (macos-latest, 3.11)	1m 52s
python-test (ubuntu-latest, 3.8)	1m 4s
python-test (ubuntu-latest, 3.9)	1m 13s
python-test (ubuntu-latest, 3.10)	1m 6s
python-test (ubuntu-latest, 3.11)	1m 4s
runner-compile (linux, amd64, ubuntu-latest)	1m 26s
runner-upload	14s
pypi-upload	14s
server-docker-upload	0s
update-get-dstack-tag	0s
generate-json-schema	0s
	14m 59s

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