Fix CI for stable/4.6 #838

Job	Run time
check (build)	2m 52s
doc (docs)	2m 24s
check (pep8)	2m 20s
test (py39, postgresql-file-upgrade-from-4.5)	2m 22s
doc (docs-gnocchi-web)	2m 20s
test (py39, mysql-file)	2m 23s
test (py39, mysql-file-sqlalchemy14)	2m 42s
test (py39, mysql-swift)	2m 31s
test (py39, mysql-s3)	2m 25s
test (py39, postgresql-file)	2m 34s
test (py39, postgresql-file-sqlalchemy14)	2m 46s
test (py39, postgresql-swift)	2m 52s
test (py39, postgresql-s3)	3m 28s
test (py311, postgresql-file-upgrade-from-4.5)	2m 12s
test (py311, mysql-file)	2m 9s
test (py311, mysql-file-sqlalchemy14)	2m 21s
test (py311, mysql-swift)	3m 7s
test (py311, mysql-s3)	2m 52s
test (py311, postgresql-file)	3m 45s
test (py311, postgresql-file-sqlalchemy14)	2m 52s
test (py311, postgresql-swift)	2m 44s
test (py311, postgresql-s3)	2m 26s
	58m 27s

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