Add backwards compatibility test for facets

[danyilq]

Change Summary

This PR adds a backwards compatibility test for facets. It creates all types of facets (number, array, string) and overrides some of the parameters to make sure most of the api is utilised.

Related Jira Ticket

Checklist

• Tests have been added for changes
• Documentation has been updated
• Breaking changes are clearly identified
• Python client changes linked or N/A

For new field types:

• Tests cover score modifier usage of this new type
• Test indexes updated to cover the new type for all APIs (add docs, search, partial update, etc.)