Improve error handling for validating the Faust Secret

[colinmurphy]

Description

The current issue is that if your WordPress build is returning a 500X error, when you run faust build or faust generatePossibleTypes you will get the following error

error - Validation Failed: Your Faust front-end site URL value is misconfigured. It should NOT match the NEXT_PUBLIC_WORDPRESS_URL.``

This is due to else statement - https://github.com/wpengine/faustjs/blob/canary/packages/faustwp-cli/src/healthCheck/validateNextWordPressUrl.ts#L31

Steps to reproduce

1. Have a failing WP build
2. Run npm run build or npm run generate

Additional context

No response

@faustwp/core Version

Any

@faustwp/cli Version

Any

FaustWP Plugin Version

Any

WordPress Version

Any

Additional environment details

No response

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