Upgrade to Rust 1.83 (#9511)

## Summary

A lot of good new lints, and most importantly, error stabilizations. I
tried to find a few usages of the new stabilizations, but I'm sure there
are more.

IIUC, this _does_ require bumping our MSRV.

crates/uv-python/src/installation.rs

@@ -89,7 +89,7 @@ impl PythonInstallation {
         python_install_mirror: Option<&str>,
         pypy_install_mirror: Option<&str>,
     ) -> Result<Self, Error> {
-        let request = request.unwrap_or_else(|| &PythonRequest::Default);
+        let request = request.unwrap_or(&PythonRequest::Default);
 
         // Search for the installation
         match Self::find(request, environments, preference, cache) {