Glance CORS config with port breaks image upload

[Sam Schmitt]

On a newly deployed 2023.2 stack, image uploads via Horizon fail due to a CORs error. Uploads via the OpenStack CLI/API work properly. The browser inspector shows that the request to the glance api is not from an allowed origin. Looking at the glance config, it has the section

[cors]
allowed_origin = https://example.com:443

Horizon is hosted at https://example.com with proper TLS configuration via K-A. It seems that the port in the config breaks this. After manually removing the port from the config option on all controllers and restarting the glance_api containers, image uploads via Horizon worked properly.