Function walk_async_concurrent_exclusive

pub async fn walk_async_concurrent_exclusive<F, T, M>(
    dir: &str,
    concurrency: usize,
    f: F,
    exclusion_matcher: M,
)
where
    F: FnMut(TestFile) -> T,
    T: Future<Output = TestFile>,
    M: Fn(&TestFile) -> bool,

The same as walk_async_exclusive but can run concurrent files in parallel.