Unable to deploy Realtime Database rules via PowerShell 7.1

### [REQUIRED] Environment info

**firebase-tools:** 9.6.0 (run on PowerShell 7.1)

**Platform:** Windows

### [REQUIRED] Test case

Project with two Realtime Databases (default database is disabled). Second database is located in Belgium (europe-west1).

### [REQUIRED] Steps to reproduce

1. Create firebase database target for second database.
2. firebase deploy --only database:{target_name}

### [REQUIRED] Expected behavior

Correctly deploy database rules

### [REQUIRED] Actual behavior

Error occured while deploying database rules.

`[2021-03-10T12:53:14.573Z] <<< HTTP RESPONSE 404 {"server":"nginx","date":"Wed, 10 Mar 2021 12:53:14 GMT","content-type":"application/json; charset=utf-8","content-length":"283","connection":"keep-alive","access-control-allow-origin":"*","cache-control":"no-cache","strict-transport-security":"max-age=31556926; includeSubDomains; preload"}
[2021-03-10T12:53:14.573Z] <<< HTTP RESPONSE BODY {
"correctUrl" : "https://xxxxxxxxxxxxxxxxxxxx.europe-west1.firebasedatabase.app",
"error" : "Namespace xxxxxxxxxxxxxxxxxxxx lives in a different region. Please change your database URL to https://xxxxxxxxxxxxxxxxxxxx.europe-west1.firebasedatabase.app"
}`

Start by reproducing the issue with PowerShell 7.1 using `firebase deploy --only database:{target_name}` and the debug output for a second Realtime Database in europe-west1. Trace how the CLI handles the regional database URL; done means the database rules deploy successfully without the 404 region error.

Written by the indexing model from the issue text.