fix: check environment doesnt exist before checking env quotas

[shreddedbacon]

General Checklist

• Affected Issues have been mentioned in the Closing issues section
• Documentation has been written/updated
• PR title is ready for inclusion in changelog

Database Migrations

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Fixes the environment quota check to make sure that an environment that already exists isn't evaluated to check if the quota is exceeded, and to allow it through as normal.

Also modifies the example organization deployed in local dev with a 4 env quota to validate

[tobybellwood]

Straightforward change. A++ for test consideration