feat: restructure onhost folders and naming #835

Job	Run time
cargo clippy	2m 11s
codespell	9s
cargo fmt	14s
Unit test for embedded downloader	29s
tests as root	3m 44s
cargo shear (unused dependencies)	16s
Build release binaries	2m 17s
cargo doc	1m 34s
K8s integration tests (part1)	5m 31s
build-widows-binary	8m 10s
K8s integration tests (flux-self-update)	7m 34s
K8s integration tests (part2)	8m 20s
⚖️ Check third party licenses	4m 47s
Unit, docs and onhost integration tests	2m 10s
ubuntu / stable / coverage	3m 38s
security / Rust audit scanner	2m 37s
k8s-e2e-tests / K8s e2e tests infra	8m 14s
k8s-e2e-tests / K8s e2e tests	2s
🟢 All required checks and tests pass	4s
	1h 2m 1s

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