Update preview installation of Python executables to be non-fatal (#14612)

Previously, if installation of executables into the bin directory failed
we'd with a non-zero code. However, if we make this behavior the default
we don't want it to be fatal. There's a `--bin` opt-in to _require_
successful executable installation and a `--no-bin` opt-out to silence
the warning / opt-out of installation entirely.

Part of https://github.com/astral-sh/uv/issues/14296 — we need this
before we can stabilize the behavior.

In #14614 we do the same for writing entries to the Windows registry.

crates/uv-python/src/windows_registry.rs

@@ -129,12 +129,13 @@ fn read_registry_entry(company: &str, tag: &str, tag_key: &Key) -> Option<Window
 pub enum ManagedPep514Error {
     #[error("Windows has an unknown pointer width for arch: `{_0}`")]
     InvalidPointerSize(Arch),
+    #[error("Failed to write registry entry: {0}")]
+    WriteError(#[from] windows_result::Error),
 }
 
 /// Register a managed Python installation in the Windows registry following PEP 514.
 pub fn create_registry_entry(
     installation: &ManagedPythonInstallation,
-    errors: &mut Vec<(PythonInstallationKey, anyhow::Error)>,
 ) -> Result<(), ManagedPep514Error> {
     let pointer_width = match installation.key().arch().family().pointer_width() {
         Ok(PointerWidth::U32) => 32,
@@ -146,9 +147,7 @@ pub fn create_registry_entry(
         }
     };
 
-    if let Err(err) = write_registry_entry(installation, pointer_width) {
-        errors.push((installation.key().clone(), err.into()));
-    }
+    write_registry_entry(installation, pointer_width)?;
 
     Ok(())
 }