Windows path for pgpass is wrong

[anarchodin]

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Description

The path searched by sqlx for the password file does not match what libpq searches. This causes sqlx-based programs not to find an existing, working pgpass file on Windows.

Reproduction steps

Create a pgpass file on Windows. Use it with a libpq-based program. Try an sqlx-based program and see it fail.

SQLx version

not relevant

Enabled SQLx features

not relevant

Database server and version

postgresql, any

Operating system

Windows

Rust version

not relevant