script: Ensure notify_invalidations() is always called when modifying stylesheets (#38530)

This change supplements the missing stylesheet invalidation
notifications to fix some bugs that the modification of stylesheet does
not take effect. Additionally, this PR add a RAII thing to mark the
modification scope of stylesheet rules, which will facilitate to add
extra logic before the modification happens.

Fixes: there is relevant issue #38211 , but it can't be fixed by this
PR.
Testing: This fixes some subtests in
`/css/cssom/CSSStyleSheet-constructable.html`.

Signed-off-by: sharpshooter_pt <ibluegalaxy_taoj@163.com>

components/script/dom/csskeyframesrule.rs

@@ -114,6 +114,7 @@ impl CSSKeyframesRuleMethods<crate::DomTypeHolder> for CSSKeyframesRule {
                 .keyframes
                 .push(rule);
             self.rulelist(can_gc).append_lazy_dom_rule();
+            self.cssrule.parent_stylesheet().notify_invalidations();
         }
     }
 
@@ -145,6 +146,7 @@ impl CSSKeyframesRuleMethods<crate::DomTypeHolder> for CSSKeyframesRule {
         let name = KeyframesName::from_ident(&value);
         let mut guard = self.cssrule.shared_lock().write();
         self.keyframesrule.write_with(&mut guard).name = name;
+        self.cssrule.parent_stylesheet().notify_invalidations();
         Ok(())
     }
 }