ss-1359 Introduce throttling for the auth endpoint

[j-awada]

Description

• ! Once reviewed and approved - update settings.py in serve-repo

Jira: https://scilifelab.atlassian.net/browse/SS-1359

This PR aims to throttle the auth endpoint to a given number of requests per minute. This comes after a user was repeatedly calling this endpoint causing an outage.

Although some rate limiting will be done at the Ingress level, further limits will be done on the auth endpoint excluding UU IP range for testing purposes.

Checklist

• This pull request is against develop branch (not applicable for hotfixes)
• I have included a link to the issue on GitHub or JIRA (if any)
• I have included migration files (if there are changes to the model classes)
• I have included, reviewed and executed tests (unit and end2end) to complement my changes
• I have updated the related documentation (if necessary)
• I have added a reviewer for this pull request
• I have added myself as an author for this pull request
• In the case I have modified settings.py, then I have also updated the studio-settings-configmap.yaml file in serve-charts
• In case your changes are large enough, did you deploy your changes to develop instance?