Remove RHEL7 and scl_enable #662

Job	Run time
Check distgen generated files	29s
Container tests: 11 - fedora	5s
Container tests: 11 - rhel10	7s
Container tests: 11 - rhel8	9s
Container tests: 11 - rhel9	7s
Container tests: 11 - c9s	6s
Container tests: 13 - c9s	12m 17s
Container tests: 11 - c10s	7s
Container tests: 12 - rhel9	7s
Container tests: 12 - c10s	6s
Container tests: 13 - fedora	5s
Container tests: 12 - fedora	7s
Container tests: 13 - rhel8	22m 19s
Container tests: 12 - c9s	4s
Container tests: 14 - fedora	4s
Container tests: 14 - rhel10	7s
Container tests: 14 - rhel8	8s
Container tests: 13 - rhel10	6s
Container tests: 12 - rhel8	20m 16s
Container tests: 13 - c10s	4s
Container tests: 12 - rhel10	6s
Container tests: 13 - rhel9	22m 19s
Container tests: 15 - rhel10	6s
Container tests: 14 - rhel9	8s
Container tests: 15 - rhel9	22m 17s
Container tests: 16 - rhel10	16m 12s
Container tests: 16 - c9s	14m 18s
Container tests: 14 - c10s	7s
Container tests: 15 - c10s	4s
Container tests: 15 - fedora	10m 24s
Container tests: 14 - c9s	6s
Container tests: 15 - c9s	14m 19s
Container tests: 16 - fedora	10m 18s
Container tests: 16 - rhel8	20m 21s
Container tests: 16 - c10s	12m 18s
Container tests: 15 - rhel8	20m 20s
Container tests: 16 - rhel9	24m 21s
	4h 5m 4s

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