CI - Fix smoketests using wrong binary path (#4280)

# Description of Changes

The smoketests try to infer whether to use the built `debug` or
`release` binaries.. but the common invocation via `cargo ci smoketests`
always pre-builds the release binaries. This was causing people to test
the wrong binary locally.

# API and ABI breaking changes

None.

# Expected complexity level and risk

1.

# Testing

- [x] CI passes

Co-authored-by: Zeke Foppa <bfops@users.noreply.github.com>

Author: bfops

crates/guard/src/lib.rs

@@ -42,7 +42,7 @@ fn target_dir() -> PathBuf {
 
 /// Returns the expected CLI binary path.
 fn cli_binary_path() -> PathBuf {
-    let profile = if cfg!(debug_assertions) { "debug" } else { "release" };
+    let profile = "release";
     let cli_name = if cfg!(windows) {
         "spacetimedb-cli.exe"
     } else {