Add minimum requirement for sqlalchemy to 1.4.24 #628

Job	Run time
test (py36, postgresql-file-upgrade-from-4.4)	3m 59s
test (py36, mysql-file)	4m 23s
check (build)	56s
test (py36, mysql-swift)	4m 34s
doc (docs)	2m 15s
check (pep8)	51s
test (py36, mysql-s3)	4m 49s
doc (docs-gnocchi-web)	2m 18s
test (py36, postgresql-file)	4m 38s
test (py36, postgresql-swift)	4m 28s
test (py36, postgresql-s3)	4m 15s
test (py38, mysql-ceph-upgrade-from-4.4)	3m 43s
test (py38, postgresql-file-upgrade-from-4.4)	2m 33s
test (py38, mysql-file)	3m 48s
test (py38, mysql-swift)	3m 33s
test (py38, mysql-s3)	4m 3s
test (py38, mysql-ceph)	4m 22s
test (py38, postgresql-file)	2m 35s
test (py38, postgresql-swift)	1m 41s
test (py38, postgresql-s3)	2m 25s
test (py38, postgresql-ceph)	2m 48s
test (py39, postgresql-file-upgrade-from-4.4)	1s
test (py39, mysql-file)	1m 11s
test (py39, mysql-swift)	1s
test (py39, mysql-s3)	22s
test (py39, postgresql-file)	1s
test (py39, postgresql-swift)	1s
test (py39, postgresql-s3)	1s
	1h 10m 35s

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