Rollup merge of #134420 - Integral-Tech:pathbuf-refactor, r=compiler-errors

refactor: replace &PathBuf with &Path to enhance generality

- According to [style.md](https://github.com/rust-lang/rust/blob/master/src/tools/rust-analyzer/docs/dev/style.md#useless-types):

> More generally, always prefer types on the left
```rust
// GOOD      BAD
&[T]         &Vec<T>
&str         &String
Option<&T>   &Option<T>
&Path        &PathBuf
```

src/bootstrap/src/core/build_steps/setup.rs

@@ -209,7 +209,7 @@ pub fn setup(config: &Config, profile: Profile) {
     setup_config_toml(path, profile, config);
 }
 
-fn setup_config_toml(path: &PathBuf, profile: Profile, config: &Config) {
+fn setup_config_toml(path: &Path, profile: Profile, config: &Config) {
     if profile == Profile::None {
         return;
     }

src/bootstrap/src/core/config/config.rs

@@ -1942,7 +1942,7 @@ impl Config {
                 );
 
                 let channel = config
-                    .read_file_by_commit(&PathBuf::from("src/ci/channel"), commit)
+                    .read_file_by_commit(Path::new("src/ci/channel"), commit)
                     .trim()
                     .to_owned();
 
@@ -2383,12 +2383,10 @@ impl Config {
     /// Return the version it would have used for the given commit.
     pub(crate) fn artifact_version_part(&self, commit: &str) -> String {
         let (channel, version) = if self.rust_info.is_managed_git_subrepository() {
-            let channel = self
-                .read_file_by_commit(&PathBuf::from("src/ci/channel"), commit)
-                .trim()
-                .to_owned();
+            let channel =
+                self.read_file_by_commit(Path::new("src/ci/channel"), commit).trim().to_owned();
             let version =
-                self.read_file_by_commit(&PathBuf::from("src/version"), commit).trim().to_owned();
+                self.read_file_by_commit(Path::new("src/version"), commit).trim().to_owned();
             (channel, version)
         } else {
             let channel = fs::read_to_string(self.src.join("src/ci/channel"));