Update Snapshot ARN to Pinecone-controlled AWS account

[zackproser]

Problem

The original RDS Snapshot was homed in a test AWS account.

Solution

Migrate the RDS Snapshot to Pinecone's GTM account.

Type of Change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update
• [x] Infrastructure change (CI configs, etc)
• [ ] Non-code change (docs, etc)
• [ ] None of the above: (explain here)

Test Plan

Describe specific steps for validating this change.