LibWeb: Implement 'no-validate state' concept

Author: https://github.com/edvwib 🔰
Commit: 8ca956e6f1
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4592
Reviewed-by: https://github.com/tcl3

Libraries/LibWeb/HTML/FormAssociatedElement.h

@@ -110,6 +110,9 @@ public:
     // https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#concept-fv-valid
     bool satisfies_its_constraints() const;
 
+    // https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#concept-fs-novalidate
+    bool novalidate_state() const;
+
     // https://html.spec.whatwg.org/multipage/form-control-infrastructure/#definitions
     virtual bool suffering_from_being_missing() const { return false; }
     virtual bool suffering_from_a_type_mismatch() const { return false; }