fix: switch to @eslint-community/eslint-utils (qunitjs#660)

**Title:** refactor: replace `eslint-utils` with
`@eslint-community/eslint-utils`

## Summary

- The `eslint-utils` package is deprecated. Replaced it with the
actively maintained fork `@eslint-community/eslint-utils`, which has an
identical `ReferenceTracker` API.
- Updated the `require` in 5 rules: `no-assert-equal`,
`no-global-assertions`, `no-global-expect`, `no-global-module-test`,
`no-global-stop-start`.
- Swapped the dependency in `package.json` from `eslint-utils ^3.0.0` to
`@eslint-community/eslint-utils ^4.4.0`.

## Test plan

- All existing tests pass unchanged. This is a drop-in replacement with
no behavioral changes.

Fixes qunitjs#655.

Author: bmish

lib/rules/no-assert-equal.js

@@ -10,7 +10,7 @@
 
 const assert = require("node:assert"),
     utils = require("../utils"),
-    { ReferenceTracker } = require("eslint-utils");
+    { ReferenceTracker } = require("@eslint-community/eslint-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

lib/rules/no-global-assertions.js

@@ -9,7 +9,7 @@
 //------------------------------------------------------------------------------
 
 const { getAssertionNames } = require("../utils");
-const { ReferenceTracker } = require("eslint-utils");
+const { ReferenceTracker } = require("@eslint-community/eslint-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

lib/rules/no-global-expect.js

@@ -8,7 +8,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const { ReferenceTracker } = require("eslint-utils");
+const { ReferenceTracker } = require("@eslint-community/eslint-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

lib/rules/no-global-module-test.js

@@ -8,7 +8,7 @@
 // Requirements
 //------------------------------------------------------------------------------
 
-const { ReferenceTracker } = require("eslint-utils");
+const { ReferenceTracker } = require("@eslint-community/eslint-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

lib/rules/no-global-stop-start.js

@@ -6,7 +6,7 @@
  */
 "use strict";
 
-const { ReferenceTracker } = require("eslint-utils");
+const { ReferenceTracker } = require("@eslint-community/eslint-utils");
 
 //------------------------------------------------------------------------------
 // Rule Definition

package-lock.json

@@ -27,7 +27,7 @@
     "dist/"
   ],
   "dependencies": {
-    "eslint-utils": "^3.0.0",
+    "@eslint-community/eslint-utils": "^4.4.0",
     "requireindex": "^1.2.0"
   },
   "devDependencies": {