LibJS/JIT: Compile the GetPrivateById instruction

Author: https://github.com/skyrising
Commit: 4e9edb8c53
Pull-request: https://github.com/SerenityOS/serenity/pull/21682

Userland/Libraries/LibJS/Bytecode/Op.h

@@ -621,6 +621,8 @@ public:
     ThrowCompletionOr<void> execute_impl(Bytecode::Interpreter&) const;
     DeprecatedString to_deprecated_string_impl(Bytecode::Executable const&) const;
 
+    IdentifierTableIndex property() const { return m_property; }
+
 private:
     IdentifierTableIndex m_property;
 };