Remove external API calls in `TestPassword` (#30716)
The test had a dependency on `https://api.pwnedpasswords.com` which
caused many failures on CI recently:
```
--- FAIL: TestPassword (2.37s)
pwn_test.go:41: Get "https://api.pwnedpasswords.com/range/e6b6a": context deadline exceeded (Client.Timeout exceeded while awaiting headers)
FAIL
coverage: 82.9% of statements
```
(cherry picked from commit 9235442ba58524c8d12ae54865d583acfa1f439d)
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