chore(cubejs-backend-native): Fix Clippy warnings with python feature and setup CI (#8578)

Author: mcheshkov

.github/workflows/rust-cubesql.yml

@@ -45,6 +45,8 @@ jobs:
         run: cd packages/cubejs-backend-native && cargo fmt --all -- --check
       - name: Clippy Native
         run: cd packages/cubejs-backend-native && cargo clippy -- -D warnings
+      - name: Clippy Native (with Python)
+        run: cd packages/cubejs-backend-native && cargo clippy --features python -- -D warnings
       # CubeSQL is not ready for Clippy
       #- name: Clippy CubeSQL
       #  run: cd rust/cubesql && cargo clippy -- -D warnings

packages/cubejs-backend-native/src/cross/clrepr_python.rs

@@ -29,7 +29,7 @@ impl CLReprPython for CLRepr {
             return Ok(Self::Null);
         }
 
-        return Ok(if v.get_type().is_subclass_of::<PyString>()? {
+        Ok(if v.get_type().is_subclass_of::<PyString>()? {
             let string_type = if v.hasattr("is_safe")? {
                 StringType::Safe
             } else {
@@ -123,7 +123,7 @@ impl CLReprPython for CLRepr {
             }
 
             Self::PythonRef(PythonRef::PyObject(v.into()))
-        });
+        })
     }
 
     fn into_py_impl(from: CLRepr, py: Python) -> Result<PyObject, PyErr> {

packages/cubejs-backend-native/src/cross/py_in_js.rs

@@ -34,7 +34,7 @@ pub fn cl_repr_py_function_wrapper(mut cx: FunctionContext) -> JsResult<JsPromis
         .this::<JsValue>()?
         .downcast_or_throw::<BoxedJsPyFunctionWrapper, _>(&mut cx)?;
 
-    let mut arguments = Vec::with_capacity(cx.len() as usize);
+    let mut arguments = Vec::with_capacity(cx.len());
 
     for arg_idx in 0..cx.len() {
         arguments.push(CLRepr::from_js_ref(

packages/cubejs-backend-native/src/python/cube_config.rs

@@ -66,7 +66,7 @@ impl CubeConfigPy {
     }
 
     pub fn attr(&mut self, config_module: &PyAny, key: &str) -> PyResult<()> {
-        let v = config_module.getattr(&*key)?;
+        let v = config_module.getattr(key)?;
         if !v.is_none() {
             let value = CLRepr::from_python_ref(v)?;
             self.properties.insert(key.to_case(Case::Camel), value);