Add missing test for AWS geolocation subdivision routing policy

[TwiN]

Description

Adds a missing test for the AWS provider targeting the geolocation (subdivision) routing policy.

Checklist

• Unit tests updated
• End user documentation updated

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[TwiN]

/assign @Raffo

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/lifecycle stale

[Raffo]

/approve
/lgtm

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Raffo, TwiN

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