Migrate run-make/const-prop-lint to rmake.rs

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -22,7 +22,6 @@ run-make/compiler-lookup-paths-2/Makefile
 run-make/compiler-lookup-paths/Makefile
 run-make/compiler-rt-works-on-mingw/Makefile
 run-make/compressed-debuginfo/Makefile
-run-make/const-prop-lint/Makefile
 run-make/const_fn_mir/Makefile
 run-make/crate-data-smoke/Makefile
 run-make/crate-hash-rustc-version/Makefile

tests/run-make/const-prop-lint/Makefile

@@ -1,9 +0,0 @@
-include ../tools.mk
-
-# Test that emitting an error because of arithmetic
-# overflow lint does not leave .o files around
-# because of interrupted codegen.
-
-all:
-	$(RUSTC) input.rs; test $$? -eq 1
-	ls *.o; test $$? -ne 0

tests/run-make/const-prop-lint/rmake.rs

@@ -0,0 +1,18 @@
+// Tests that const prop lints interrupting codegen don't leave `.o` files around.
+
+use std::fs;
+
+use run_make_support::{rustc, tmp_dir};
+
+fn main() {
+    rustc().input("input.rs").run_fail_assert_exit_code(1);
+
+    for entry in fs::read_dir(tmp_dir()).unwrap() {
+        let entry = entry.unwrap();
+        let path = entry.path();
+
+        if path.is_file() && path.extension().is_some_and(|ext| ext == "o") {
+            panic!("there should not be `.o` files!");
+        }
+    }
+}