Remove CI image build hacks #876

Job	Run time
doc (docs)	3m 14s
check (build)	2m 25s
doc (docs-gnocchi-web)	3m 7s
check (pep8)	2m 17s
test (py39, postgresql-file-upgrade-from-4.5)	1s
test (py39, mysql-file)	1s
test (py39, mysql-file-sqlalchemy14)	1s
test (py39, mysql-swift)	1s
test (py39, mysql-s3)	1s
test (py39, postgresql-file)	1s
test (py39, postgresql-file-sqlalchemy14)	1s
test (py39, postgresql-swift)	1s
test (py39, postgresql-s3)	1s
test (py311, postgresql-file-upgrade-from-4.5)	2m 45s
test (py311, mysql-file)	2m 45s
test (py311, mysql-file-sqlalchemy14)	3m 2s
test (py311, mysql-swift)	3m 1s
test (py311, mysql-s3)	3m 1s
test (py311, postgresql-file)	2m 57s
test (py311, postgresql-file-sqlalchemy14)	3m 1s
test (py311, postgresql-swift)	3m 1s
test (py311, postgresql-s3)	3m 1s
test (py312, mysql-ceph-upgrade-from-4.5)	3m 1s
test (py312, postgresql-file-upgrade-from-4.5)	26s
test (py312, mysql-file)	3m 0s
test (py312, mysql-file-sqlalchemy14)	3m 0s
test (py312, mysql-swift)	3m 0s
test (py312, mysql-s3)	3m 0s
test (py312, postgresql-file)	2m 59s
test (py312, postgresql-file-sqlalchemy14)	6m 49s
test (py312, postgresql-swift)	1s
test (py312, postgresql-s3)	18s
	1h 3m 20s

Provide feedback