Remove sky dependency for autostop configs

[carolineechen]

throw error if user has autostop set, or is trying to set autostop on a cluster, but sky is not installed on the cluster (in the runhouse server env)

[carolineechen]

• Install Runhouse on the Cluster before Default Env so user settings override Runhouse reqs #745
• Add tests for default env #715
• Cluster default env #678
• Optional resolve children arg from from_name/config #714
• Add basic package tests #710
• Util for running cmds on local/cluster #698
• Remove sky dependency for autostop configs #697 👈
• main

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[rohinb2]

Merge activity

• Apr 22, 4:46 PM EDT: @rohinb2 started a stack merge that includes this pull request via Graphite.
• Apr 22, 4:46 PM EDT: @rohinb2 merged this pull request with Graphite.