Fix SSHAttach.reuse_ports_lock() when no grep matches (#1700) #212

Job	Run time
gateway-build	13s
runner-test	1m 15s
python-lint	11s
frontend-build	1m 0s
python-test (macos-latest, 3.8)	2m 24s
python-test (macos-latest, 3.9)	1m 31s
python-test (macos-latest, 3.10)	1m 21s
python-test (macos-latest, 3.11)	1m 17s
python-test (macos-latest, 3.12)	1m 56s
python-test (ubuntu-latest, 3.8)	1m 50s
python-test (ubuntu-latest, 3.9)	3m 45s
python-test (ubuntu-latest, 3.10)	3m 27s
python-test (ubuntu-latest, 3.11)	3m 28s
python-test (ubuntu-latest, 3.12)	3m 53s
python-test (windows-latest, 3.8)	3m 25s
python-test (windows-latest, 3.9)	3m 8s
python-test (windows-latest, 3.10)	4m 26s
python-test (windows-latest, 3.11)	5m 19s
python-test (windows-latest, 3.12)	3m 30s
runner-compile (linux, amd64, ubuntu-latest)	14s
runner-upload	14s
pypi-upload	20s
update-get-dstack-tag	8s
generate-json-schema	31s
server-docker-upload	12m 54s
	1h 1m 40s

Provide feedback