Automatically build and promote overcloud host images #5886

Job	Run time
Ansible 2.18 lint with Python 3.12	1m 46s
Tox pep8 with Python 3.12	33s
Tox docs with Python 3.12	28s
Tox releasenotes with Python 3.12	35s
Ansible 2.17 lint with Python 3.10	1m 41s
Check changed files	4s
Build Kayobe Image / Build kayobe image	43s
aio (Rocky 9 OVS)	-1s
aio (Rocky 9 OVN)	-1s
aio upgrade (Rocky 9 OVN)	-1s
Check container image tags	-1s
aio upgrade (Ubuntu Jammy to Noble OVN)	-1s
aio (Ubuntu Noble OVN)	-1s
aio upgrade (Rocky 9 OVS)	-1s
	5m 43s

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