Add SSH keys to GCP metadata (#881) #146

Job	Run time
python-lint	30s
gateway-build	24s
runner-test	4m 20s
python-test (macos-latest, 3.8)	2m 35s
python-test (macos-latest, 3.9)	1m 54s
python-test (macos-latest, 3.10)	2m 28s
python-test (macos-latest, 3.11)	2m 23s
python-test (ubuntu-latest, 3.8)	1m 12s
python-test (ubuntu-latest, 3.9)	1m 16s
python-test (ubuntu-latest, 3.10)	1m 28s
python-test (ubuntu-latest, 3.11)	1m 11s
runner-compile (linux, amd64, ubuntu-latest)	1m 27s
runner-upload	18s
pypi-upload	18s
generate-json-schema	37s
server-docker-upload	10m 57s
update-get-dstack-tag	9s
	33m 27s

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