defconfigs: add AWS P5.4xlarge GPU instance support #41

Job	Run time
Build kdevops Container (opensuse)	2m 43s
Build kdevops Container (fedora)	2m 3s
Build kdevops Container (debian)	3m 30s
Linux A/B Tests (debian)	1m 7s
Linux A/B Tests (opensuse)	50s
Linux A/B Tests (fedora)	45s
Quick Config Tests (blktests_nvme) on debian	58s
Quick Config Tests (blktests_nvme) on fedora	46s
Quick Config Tests (blktests_nvme) on opensuse	48s
Quick Config Tests (xfs_reflink_4k) on fedora	44s
Quick Config Tests (lbs-xfs) on debian	55s
Quick Config Tests (xfs_reflink_4k) on opensuse	1m 2s
Quick Config Tests (lbs-xfs) on fedora	46s
Quick Config Tests (linux-ab-testing) on debian	53s
Quick Config Tests (lbs-xfs) on opensuse	49s
Quick Config Tests (linux-ab-testing) on fedora	46s
Quick Config Tests (xfs_reflink_4k) on debian	56s
Quick Config Tests (linux-ab-testing) on opensuse	48s
	21m 9s

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