cli(on-hots): support empty proxy on config generation (#1834) #1252

Job	Run time
⚖️ Check third party licenses	5m 5s
cargo clippy	2m 4s
cargo shear (unused dependencies)	12s
cargo doc	1m 50s
codespell	20s
ubuntu / stable / coverage	4m 13s
cargo fmt	17s
Build release binaries	2m 13s
Unit, docs and onhost integration tests	8m 20s
Unit test for embedded downloader	32s
K8s integration tests (part2)	5m 58s
build-windows-binary	4m 52s
tests as root	3m 55s
K8s integration tests (part1)	9m 7s
K8s integration tests (flux-self-update)	6m 34s
security / Rust audit scanner	2m 41s
k8s-e2e-tests / K8s e2e tests infra	9m 53s
k8s-e2e-tests / K8s e2e tests	5s
🟢 All required checks and tests pass	4s
	1h 8m 15s

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