[Bug] Turning down stopped cluster doesn't work

### What happened? Based on the log lines, it should be possible. ``` (oumi) 16:08:55 ~/Documents/repos/oumi main $ oumi launch stop --cluster smollm-135m-fft ____ _ _ __ __ _____ / __ \| | | | \/ |_ _| | | | | | | | \ / | | | | | | | | | | |\/| | | | | |__| | |__| | | | |_| |_ \____/ \____/|_| |_|_____| ⠧ Stopping cluster smollm-135m-fftWARNING:torchao.kernel.intmm:Warning: Detected no triton, on systems without Triton certain kernels will not work Cluster smollm-135m-fft stopped! Use oumi launch down to turn it down. (oumi) 16:42:00 ~/Documents/repos/oumi main $ oumi launch down --cluster smollm-135m-fft ____ _ _ __ __ _____ / __ \| | | | \/ |_ _| | | | | | | | \ / | | | | | | | | | | |\/| | | | | |__| | |__| | | | |_| |_ \____/ \____/|_| |_|_____| ⠴ Turning down cluster smollm-135m-fftWARNING:torchao.kernel.intmm:Warning: Detected no triton, on systems without Triton certain kernels will not work ⠴ Turning down cluster smollm-135m-fftCluster smollm-135m-fft not found. Cluster smollm-135m-fft turned down! (oumi) 16:42:10 ~/Documents/repos/oumi main $ sky status Clusters NAME LAUNCHED RESOURCES STATUS AUTOSTOP COMMAND smollm-135m-fft 34 mins ago 1x GCP(a2-highgpu-1g[Spot], {'A100': 1}, disk_size=100) STOPPED 60m /opt/miniconda3/envs/oumi... aledade 1 month ago 1x GCP(a2-highgpu-4g, {'A100': 4}, disk_size=2000) STOPPED 60m /opt/miniconda3/envs/oumi... Managed jobs No in-progress managed jobs. (See: sky jobs -h) Services No live services. (See: sky serve -h) ``` ### Steps to reproduce the bug See above ### System Info ```shell N/A ```