Location enablement pipeline should work (or fail better)

[ajoga]

As an OVHcloud customer using Public Cloud
When I want to enable a new region through Quota and Regions > Regions
I want either:

• the addition to work right away, or
• a visual feedback in the UX that something failed

so that I don't wait an unspecified amount of time for nothing to happen

We've tried three times to add locations in our tenant, the three times the submit buttons becomes loading.gif and then we don't know what happen.
Looking at the web developer console we can see that the associated POST has return an internal server error, and the frontend didn't act upon it:

We noticed that after visiting the console few hours later, the location was made available to us nonetheless.