chore: add csp exception for clarity analytics

[lazysoundsystem]

Refs: RW-1164

The documentation suggests putting the exceptions for default-src, which
feels like overreach.

[lazysoundsystem]

If this isn't included in the upcoming deployment - we can add the exceptions via the UI and merge this so they're not overwritten on the subsequent deployment.

[github-actions]

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[github-actions]

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Pusher: @lazysoundsystem, Action: pull_request, Workflow: Run tests