Move select/option/optgroup-related tests in fast/forms to fast/forms/select.

third_party/WebKit/LayoutTests/fast/forms/select/menulist-selection-reset.html

 <select id="select">
     <option>FAIL</option>
     <option>PASS</option>
     <option selected="true">Did not run</option>
 </select>
 <p id="result">
 </p>
 <script>
     if (window.testRunner)
         testRunner.dumpAsText();
 
     select.selectedIndex = 1;
     result.innerText = select.selectedIndex == 1 ? "PASS" : "FAIL";
 </script>