gitlab: run the RHEL 8 alias test on RHEL 8.8 (GA) #16409

Job	Run time
🧹 cloud-cleaner-is-enabled	1s
🗄 DB tests	1m 52s
🔍 Check for valid snapshot urls	46s
🔍 Check for missing or unused runner repos	13s
⌨ Golang Lint	3m 24s
Gitlab CI trigger helper	8s
🎀 kube-linter	16s
📦 Packit config lint	1m 7s
🔍 Check source preparation	1m 7s
🐍 Lint python scripts	58s
📦 RPMlint	1m 3s
🐚 Shellcheck	22s
🛃 Unit tests	3m 56s
	15m 13s

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