Fix clippy errors (Mac) (#9440)

<!--
if this PR closes one or more issues, you can automatically link the PR
with
them by using one of the [*linking
keywords*](https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue#linking-a-pull-request-to-an-issue-using-a-keyword),
e.g.
- this PR should close #xxxx
- fixes #xxxx

you can also mention related issues, PRs or discussions!
-->

# Description

Was getting errors when running the clip checks on another PR.
Applied the suggested fixes.


<img width="1792" alt="image"
src="https://github.com/nushell/nushell/assets/432535/bec30bd9-307d-4877-9eb8-1f8f3ed3edd9">


<img width="1527" alt="image"
src="https://github.com/nushell/nushell/assets/432535/f540da61-aa81-4a9e-9948-46d8d45afecb">

crates/nu-command/src/filesystem/rm.rs

@@ -251,7 +251,7 @@ fn rm(
 
     for target in targets {
         if currentdir_path.to_string_lossy() == target.item
-            || currentdir_path.starts_with(&format!("{}{}", target.item, std::path::MAIN_SEPARATOR))
+            || currentdir_path.starts_with(format!("{}{}", target.item, std::path::MAIN_SEPARATOR))
         {
             return Err(ShellError::GenericError(
                 "Cannot remove any parent directory".into(),

crates/nu-parser/src/parse_keywords.rs

@@ -2637,7 +2637,7 @@ pub fn parse_overlay_use(working_set: &mut StateWorkingSet, call: Box<Call>) ->
                 (
                     new_name
                         .map(|spanned| spanned.item)
-                        .unwrap_or(String::from_utf8_lossy(&new_module.name).to_string()),
+                        .unwrap_or_else(|| String::from_utf8_lossy(&new_module.name).to_string()),
                     new_module,
                     module_id,
                     true,