Add dashboards for when backing ratio falls below 80%

[rwatts07]

References: https://linear.app/thesis-co/issue/CRED-1447/add-incident-response-procedure-for-large-liquidations

Depends on: #540

Introduction

This PR adds a dashboard and alerting for when Active Pool BTC < 80% of total circulating MUSD supply (in MUSD terms).

Changes

Testing

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Author's checklist

• Provided the appropriate description of the pull request
• Updated relevant unit and integration tests
• Updated relevant documentation (docs/) or specification (x/<module>/spec/)
• Assigned myself in the Assignees field
• Assigned mezod-developers in the Reviewers field and notified them on Discord

Reviewer's checklist

• Confirmed all author's checklist items have been addressed
• Considered security implications of the code changes
• Considered performance implications of the code changes
• Tested the changes and summarized covered scenarios and results in a comment

[linear]

CRED-1447 Add Incident Response Procedure for Large Liquidations