`EDGEDB_SECRET_KEY` is sometimes ignored by the CLI

[raddevon]

When trying to connect to an EdgeDB Cloud instance via CLI providing the secret key via the EDGEDB_SECRET_KEY env var and the instance name via CLI option, the user receives an error: edgedb error: NoCloudConfigFound: connecting cloud instance requires a secret key

If you instead provide both via environment variable, the CLI connects as expected.

• EdgeDB Version: 4.2
• EdgeDB CLI Version: 4.0.2+500be79
• OS Version: macOS 14.0

Steps to Reproduce:

1. Create an EdgeDB Cloud instance
2. Create (and capture) a secret key
3. Run edgedb cloud logout
4. Try to connect to your instance with this:

EDGEDB_SECRET_KEY="<key>" edgedb -I <instance-name>