refactor(template-no-noninteractive-tabindex): consume shared INTERACTIVE_ROLES util (Copilot review)

Replace inline derivation (widget/command/composite/input/range ancestor
union) with the shared util's (widget-ancestor only + toolbar). The util
is more spec-correct: 'meter' was in the inline set via its 'range'
ancestor but per ARIA 1.2 it's a structure/section role, not a widget.
All 49 existing tests pass. Addresses the dead-import concern AND the
'two sources of truth' concern in one change.

Author: johanrd

lib/rules/template-no-noninteractive-tabindex.js

@@ -1,37 +1,7 @@
 const { dom, roles } = require('aria-query');
 const { isNativeElement } = require('../utils/is-native-element');
 const { isHtmlInteractiveContent } = require('../utils/html-interactive-content');
-
-// Interactive ARIA roles (widget/command/composite/input/range subtypes) —
-// tabindex is required for widget keyboard access, so allow it when present.
-const INTERACTIVE_ROLES = buildInteractiveRoleSet();
-
-function buildInteractiveRoleSet() {
-  const result = new Set();
-  for (const [role, def] of roles) {
-    if (def.abstract) {
-      continue;
-    }
-    const ancestors = new Set();
-    for (const chain of def.superClass || []) {
-      for (const cls of chain) {
-        ancestors.add(cls);
-      }
-    }
-    if (
-      ancestors.has('widget') ||
-      ancestors.has('command') ||
-      ancestors.has('composite') ||
-      ancestors.has('input') ||
-      ancestors.has('range')
-    ) {
-      result.add(role);
-    }
-  }
-  // toolbar is practically widget-like — see jsx-a11y's note.
-  result.add('toolbar');
-  return result;
-}
+const { INTERACTIVE_ROLES } = require('../utils/interactive-roles');
 
 function findAttr(node, name) {
   // HTML attribute names are case-insensitive. Normalize both sides so