Tests rely on deprecated assert_cmd::cargo_bin which will break on future Cargo versions

[epage]

https://github.com/launchbadge/sqlx/blob/e8384f2a00173c2b120eea72e99d120557fced8b/sqlx-cli/tests/add.rs#L120

cargo_bin relies on implementation details of cargo that will soon break (rust-lang/cargo#16147, rust-lang/cargo#15010).

You can test this by running:

CARGO_BUILD_BUILD_DIR="{cargo-cache-home}/build/{workspace-path-hash}" cargo test

The replacement is assert_cmd::cargo_bin!

[epage]

(as a discussion because the issue templates had too much unrelated boilerplate)

[abonander]

addressed by #4134