Run tests twice, one for main crate and once for subcrate

It seems like restoring the cache for subcrate deletes sometimes removes the compiled binaries for
the parent crate. I'm not sure what's going on here, as it doesn't happen every time.

run-tests/src/main.rs

@@ -24,6 +24,8 @@ struct Args {
     expect_cross_version: Option<String>,
     #[arg(long)]
     expect_stripped: bool,
+    #[arg(long)]
+    is_subcrate: bool,
 }
 
 fn main() {
@@ -39,24 +41,27 @@ fn main() {
     );
 
     let checkout_root_path = PathBuf::from(args.checkout_root);
-    let bin_paths = vec![
-        checkout_root_path
-            .join("target")
-            .join(&args.target)
-            .join("debug")
-            .join("bin1"),
-        checkout_root_path
-            .join("target")
-            .join(&args.target)
-            .join("debug")
-            .join("bin2"),
-        checkout_root_path
+    let bin_paths = if args.is_subcrate {
+        vec![checkout_root_path
             .join("subcrate")
             .join("target")
             .join(&args.target)
             .join("debug")
-            .join("subcrate"),
-    ];
+            .join("subcrate")]
+    } else {
+        vec![
+            checkout_root_path
+                .join("target")
+                .join(&args.target)
+                .join("debug")
+                .join("bin1"),
+            checkout_root_path
+                .join("target")
+                .join(&args.target)
+                .join("debug")
+                .join("bin2"),
+        ]
+    };
 
     for mut bin_path in bin_paths {
         if cfg!(windows) {