stx-openstack: unnecessary images download during application-apply

[Thales Elero Cervi]

Brief Description
-----------------
It was noticed that after openstack-helm/opeastack-helm-infra updates new images were added to the charts and are being downloaded as part of stx-openstack apply, but those images are not actually used by the application:
* 'docker.io/openstackhelm/neutron:stein-ubuntu_bionic'
* 'docker.io/vexxhost/libvirtd-exporter:latest'

Severity
--------
Minor: stx-openstack is usable, just downloads unnecessary 3rc party images to local registry

Steps to Reproduce
------------------
* system application-apply stx-openstack
* grep sysinv.log for downloaded images

Expected Behavior
------------------
Only images that are actually used by stx-openstack would be downloaded

Actual Behavior
----------------
Two extra images are being downloaded

Reproducibility
---------------
Reproducible

System Configuration
--------------------
N/A

Branch/Pull Time/Commit
-----------------------
starlingx/master/debian/openstack/ (Nov 07 2023)

Last Pass
---------
N/A

Timestamp/Logs
--------------
N/A

Test Activity
-------------
Developer Testing

Workaround
----------
N/A

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/starlingx/openstack-armada-app/+/900381
Committed: https://opendev.org/starlingx/openstack-armada-app/commit/1ded5ebc08f23af9c6b13ac80a1db1551be5afcc
Submitter: "Zuul (22348)"
Branch: master

commit 1ded5ebc08f23af9c6b13ac80a1db1551be5afcc
Author: Thales Elero Cervi <email address hidden>
Date: Tue Nov 7 21:21:27 2023 -0300

    Removing unused image tags

    After upversioning openstack-helm and openstack-helm-infra, update
    versions of helm charts introduced new docker images that are not used
    by our stx-openstack distro but would still be downloaded during an
    application apply if the helm values are not set to null.

    This change removes unnecessary neutron-ovn and
    libvirtd-export images.

    Closes-Bug: 2043037

    Test Plan:
    PASS - Build stx-openstack-helm-fluxcd
    PASS - Build stx-openstack application tarball
    PASS - Upload/Apply/Remove stx-openstack application

    Change-Id: I36bbde03785ad11b0cf97a9cf3e357ebd8084175
    Signed-off-by: Thales Elero Cervi <email address hidden>