Correctly propogate retries

[damccorm]

Right now if our vLLM server fails to spin up, we retry forever. This is because we're resetting the retry count every time we go through the start_server/check_connectivity loop. This fixes the issue.

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[jrmccluskey]

LGTM

[jrmccluskey]

YAML Xlang Direct workflow is broken on master and not impacted here, merging