Replace .map_or(false, $closure) with .is_some_and(closure) (#6244)

**Summary**
[Option::is_some_and](https://doc.rust-lang.org/stable/std/option/enum.Option.html#method.is_some_and)
and
[Result::is_ok_and](https://doc.rust-lang.org/std/result/enum.Result.html#method.is_ok_and)
are new methods is rust 1.70. I find them way more readable than
`.map_or(false, ...)`.

The changes are `s/.map_or(false,/.is_some_and(/g`, then manually
switching to `is_ok_and` where the value is a Result rather than an
Option.

**Test Plan** n/a^

crates/ruff_python_resolver/src/search.rs

@@ -81,7 +81,7 @@ fn find_site_packages_path(
         if let Some(preferred_dir) = candidate_dirs.iter().find(|dir| {
             dir.file_name()
                 .and_then(OsStr::to_str)
-                .map_or(false, |name| name == python_version.dir())
+                .is_some_and(|name| name == python_version.dir())
         }) {
             debug!("Found path `{}`", preferred_dir.display());
             return Some(preferred_dir.join(SITE_PACKAGES));
@@ -235,7 +235,7 @@ fn build_typeshed_third_party_package_map(
                     if inner_entry
                         .path()
                         .extension()
-                        .map_or(false, |extension| extension == "pyi")
+                        .is_some_and(|extension| extension == "pyi")
                     {
                         if let Some(stripped_file_name) = inner_entry
                             .path()