Revert "Disable Rust + clangcl."

This reverts commit 6c55fc5cb0

run_project_tests.py

@@ -1006,12 +1006,6 @@ def has_broken_rustc() -> bool:
     mesonlib.windows_proof_rmtree(dirname.as_posix())
     return pc.returncode != 0
 
-def has_broken_compiler_combination() -> bool:
-    # Clang-cl fails with Rust on the CI
-    if shutil.which('cl') is None and shutil.which('clang-cl'):
-        return True
-    return False
-
 def should_skip_rust(backend: Backend) -> bool:
     if not shutil.which('rustc'):
         return True
@@ -1020,8 +1014,6 @@ def should_skip_rust(backend: Backend) -> bool:
     if mesonlib.is_windows():
         if has_broken_rustc():
             return True
-        if has_broken_compiler_combination():
-            return True
     return False
 
 def detect_tests_to_run(only: T.Dict[str, T.List[str]], use_tmp: bool) -> T.List[T.Tuple[str, T.List[TestDef], bool]]: