Rollup merge of rust-lang#125104 - Oneirical:test6, r=jieyouxu

Migrate `run-make/no-cdylib-as-rdylib` to `rmake`

Part of rust-lang#121876 and the associated [Google Summer of Code project](https://blog.rust-lang.org/2024/05/01/gsoc-2024-selected-projects.html).

> "the test will fail if the cdylib is picked, because it doesn't export any rust symbols"

Is that true? Is there a way to verify?

I suggest maybe extending the test with: (after cleaning the directory)

```rust
    rustc()
        .input("bar.rs")
        .crate_type("cdylib")
        .run();
    rustc()
        .input("foo.rs")
        .prefer_dynamic()
        .run();
    fail();
```

to make sure we're actually testing something here.

Author: fmease

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -178,7 +178,6 @@ run-make/native-link-modifier-whole-archive/Makefile
 run-make/no-alloc-shim/Makefile
 run-make/no-builtins-attribute/Makefile
 run-make/no-builtins-lto/Makefile
-run-make/no-cdylib-as-rdylib/Makefile
 run-make/no-duplicate-libs/Makefile
 run-make/no-intermediate-extras/Makefile
 run-make/obey-crate-type-flag/Makefile

tests/run-make/no-cdylib-as-rdylib/Makefile

@@ -0,0 +1,16 @@
+// This test produces an rlib and a cdylib from bar.rs.
+// Then, foo.rs attempts to link to the bar library.
+// If the test passes, that means rustc favored the rlib and ignored the cdylib.
+// If the test fails, that is because the cdylib was picked, which does not export
+// any Rust symbols.
+// See https://github.com/rust-lang/rust/pull/113695
+
+//@ ignore-cross-compile
+
+use run_make_support::{run, rustc};
+
+fn main() {
+    rustc().input("bar.rs").crate_type("rlib").crate_type("cdylib").run();
+    rustc().input("foo.rs").arg("-Cprefer-dynamic").run();
+    run("foo");
+}