clippy: fix several lint warns (#32126)

As seems #31500 still remain opened here's the next partial fix.

Fixed list: `unused_mut`, `clippy::needless_borrow`,
`clippy::match_ref_pats`, `clippy::borrow_deref_ref`, `clippy::ptr_eq`,
`clippy::unnecessary_cast`, `clippy::derivable_impls`,
`clippy::collapsible_match`, `clippy::extra_unused_lifetimes`,
`clippy::map_clone`, `clippy::manual_filter`.


- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes are part of #31500.
- [x] These changes do not require tests because are only cosmetic.

components/script/dom/xrsession.rs

@@ -837,7 +837,7 @@ impl XRSessionMethods for XRSession {
             .borrow()
             .granted_features()
             .iter()
-            .any(|f| &*f == "hit-test")
+            .any(|f| f == "hit-test")
         {
             p.reject_error(Error::NotSupported);
             return p;