Try more offers when starting a job (#2387) #251

Job	Run time
gateway-build	13s
frontend-build	1m 7s
python-lint	13s
runner-test	3m 54s
python-test (macos-latest, 3.9)	2m 50s
python-test (macos-latest, 3.10)	2m 50s
python-test (macos-latest, 3.11)	2m 15s
python-test (macos-latest, 3.12)	2m 59s
python-test (macos-latest, 3.13)	2m 46s
python-test (ubuntu-latest, 3.9)	5m 38s
python-test (ubuntu-latest, 3.10)	5m 42s
python-test (ubuntu-latest, 3.11)	5m 20s
python-test (ubuntu-latest, 3.12)	5m 32s
python-test (ubuntu-latest, 3.13)	5m 27s
python-test (windows-latest, 3.9)	5m 15s
python-test (windows-latest, 3.10)	6m 3s
python-test (windows-latest, 3.11)	5m 58s
python-test (windows-latest, 3.12)	6m 30s
python-test (windows-latest, 3.13)	6m 56s
runner-compile (linux, amd64, ubuntu-latest)	20s
runner-upload	15s
pypi-upload	23s
update-get-dstack-tag	7s
generate-json-schema	24s
server-docker-upload	14m 38s
	1h 33m 35s

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