Add support for arbitrary kickstart file injection into ISOs (HMS-3879) #16354

Job	Run time
🗄 DB tests	1m 51s
🧹 cloud-cleaner-is-enabled	3s
🔍 Check for valid snapshot urls	46s
🔍 Check for missing or unused runner repos	14s
Gitlab CI trigger helper	2s
⌨ Golang Lint	3m 19s
🎀 kube-linter	17s
📦 Packit config lint	59s
🔍 Check source preparation	1m 3s
🐍 Lint python scripts	56s
📦 RPMlint	1m 13s
🐚 Shellcheck	23s
🛃 Unit tests	4m 8s
	15m 14s

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