Back to pull request #5051

Upgrade CI base image to Centos9 #8760

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Run time

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Job	Run time
check-commits	14s
lint / lint	29s
build / build	20s
test / test (pulp)	18m 53s
test / test (docs)	3m 4s
test / test (azure)	2m 48s
test / test (s3)	16m 40s
test / test (lowerbounds)	17m 25s
ready-to-ship	1s
deprecations	0s
	59m 54s