Fix CI for stable/4.6 #828

Job	Run time
check (build)	2m 18s
doc (docs)	2m 26s
check (pep8)	2m 25s
test (py39, postgresql-file-upgrade-from-4.5)	2m 31s
doc (docs-gnocchi-web)	2m 21s
test (py39, mysql-file)	2m 43s
test (py39, mysql-file-sqlalchemy14)	2m 49s
test (py39, mysql-swift)	2m 50s
test (py39, mysql-s3)	2m 51s
test (py39, postgresql-file)	2m 38s
test (py39, postgresql-file-sqlalchemy14)	2m 26s
test (py39, postgresql-swift)	2m 59s
test (py39, postgresql-s3)	2m 37s
test (py311, postgresql-file-upgrade-from-4.5)	2m 20s
test (py311, mysql-file)	2m 28s
test (py311, mysql-file-sqlalchemy14)	2m 35s
test (py311, mysql-swift)	2m 10s
test (py311, mysql-s3)	2m 49s
test (py311, postgresql-file)	2m 40s
test (py311, postgresql-file-sqlalchemy14)	2m 25s
test (py311, postgresql-swift)	2m 40s
test (py311, postgresql-s3)	2m 16s
	56m 17s

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