paths: Replace lazy_static! with OnceLock (#13213)

This PR replaces the `lazy_static!` usages in the `paths` crate with
`OnceLock` from the standard library.

This allows us to drop the `lazy_static` dependency from this crate.

The paths are now exposed as accessor functions that reference a private
static value.

Release Notes:

- N/A

crates/inline_completion_button/src/inline_completion_button.rs

@@ -369,7 +369,7 @@ async fn configure_disabled_globs(
 ) -> Result<()> {
     let settings_editor = workspace
         .update(&mut cx, |_, cx| {
-            create_and_open_local_file(&paths::SETTINGS, cx, || {
+            create_and_open_local_file(paths::settings_file(), cx, || {
                 settings::initial_user_settings_content().as_ref().into()
             })
         })?