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_cli/src/bin/ruff.rs

@@ -31,9 +31,10 @@ pub fn main() -> ExitCode {
     // default for convenience and backwards-compatibility, so we just
     // preprocess the arguments accordingly before passing them to Clap.
     if let Some(arg) = args.get(1) {
-        if arg.to_str().map_or(false, |arg| {
-            !Command::has_subcommand(rewrite_legacy_subcommand(arg))
-        }) && arg != "-h"
+        if arg
+            .to_str()
+            .is_some_and(|arg| !Command::has_subcommand(rewrite_legacy_subcommand(arg)))
+            && arg != "-h"
             && arg != "--help"
             && arg != "-V"
             && arg != "--version"