Clippyfy (#6341)

* Add clippy config and remove .cargo from gitignore

* first fixes

* Clippyfied

* Add clippy CI job

* comment out rusty-cachier

* minor

* fix ci

* remove DAG from check-dependent-project

* add DAG to clippy

Co-authored-by: alvicsam <alvicsam@gmail.com>

polkadot/tests/running_the_node_and_interrupt.rs

@@ -40,7 +40,7 @@ async fn running_the_node_works_and_can_be_interrupted() {
 		let mut cmd = Command::new(cargo_bin("polkadot"))
 			.stdout(process::Stdio::piped())
 			.stderr(process::Stdio::piped())
-			.args(&["--dev", "-d"])
+			.args(["--dev", "-d"])
 			.arg(tmpdir.path())
 			.arg("--no-hardware-benchmarks")
 			.spawn()