etl: Sync tests and generate them with Tera #2780

Job	Run time
markdown lint	21s
Run shellcheck on scripts	4s
configlet lint	3s
Run repository tests	39s
Clippy	6s
Check compilation (stable)	15s
Check exercises on nightly (benchmark enabled)	12s
Check Rust Formatting	27s
Check compilation (beta)	13s
	2m 20s

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