recommend: hardcoded tensor field order

[vicilliar]

Change Summary

Test fix.
Personalization changes recommend such that the order of tensor fields is now deterministic based on the tensor_fields parameter instead of it being determined by the vespa return object. This updates the tests to hardcode the tensor field order.

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.)

[vicilliar]

Passing backwards compatibility test (Except for the global score modifiers known issue): https://github.com/marqo-ai/marqo/actions/runs/15869853517/job/44748192917