workflows: Add vLLM workflow for LLM serving #17

Job	Run time
Build kdevops Container (opensuse)	2m 7s
Build kdevops Container (fedora)	1m 33s
Build kdevops Container (debian)	3m 23s
Linux A/B Tests (debian)	1m 7s
Linux A/B Tests (opensuse)	54s
Linux A/B Tests (fedora)	47s
Quick Config Tests (xfs_reflink_4k) on debian	59s
Quick Config Tests (lbs-xfs) on opensuse	53s
Quick Config Tests (blktests_nvme) on opensuse	49s
Quick Config Tests (xfs_reflink_4k) on opensuse	51s
Quick Config Tests (xfs_reflink_4k) on fedora	45s
Quick Config Tests (blktests_nvme) on debian	1m 0s
Quick Config Tests (linux-ab-testing) on fedora	51s
Quick Config Tests (linux-ab-testing) on opensuse	55s
Quick Config Tests (lbs-xfs) on debian	51s
Quick Config Tests (lbs-xfs) on fedora	43s
Quick Config Tests (blktests_nvme) on fedora	45s
Quick Config Tests (linux-ab-testing) on debian	55s
	20m 8s

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