Description of problem:
Octavia amphora images for OSP are really huge

The RPM for OSP16.1:

octavia-amphora-image-x86_64-16.1-20210727.1.el8ost.noarch.rpm 27-Jul-2021 13:52 825M

Extracted:

863M Sep 13 14:07 octavia-amphora-16.1-20210727.1.x86_64.qcow2

For reference:
RDO image (for train) is 490MB
Octavia upstream image (Centos 8) is 453MB.

Version-Release number of selected component (if applicable):
16.1/16.2