Create a nightly pipeline for GA/EUS releases #16252

Job	Run time
🗄 DB tests	1m 5s
🔍 Check for missing or unused runner repos	14s
🔍 Check for valid snapshot urls	43s
⌨ Golang Lint	1m 14s
🔍 Check source preparation	1m 13s
📦 Packit config lint	42s
🐍 Lint python scripts	57s
🛃 Unit tests	6h 0m 1s
🧹 cloud-cleaner-is-enabled	2s
Gitlab CI trigger helper	8s
🎀 kube-linter	15s
📦 RPMlint	1m 4s
🐚 Shellcheck	25s
	6h 8m 3s

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