Fix: Pass internal config paths in FileEnumerator default (fixes #13789)

When `CLIEngine` instantiates `FileEnumerator`, it explicitly passes its
own `CascadingConfigArrayFactory` instance, which now includes values
for `builtInRules`, `loadRules`, `eslintRecommendedPath`, and
`eslintAllPath`. This is the only place that ESLint core instantiates
`FileEnumerator`, so core does not rely on the constructor's default
value for `configArrayFactory`.

After `CascadingConfigArrayFactory` was extracted into
`@eslint/eslintrc`, it no longer assumed values for
`eslintRecommendedPath` and `eslintAllPath`, which `CLIEngine` now
provides. If those values are not passed, as is the case with the
default `CascadingConfigArrayFactory` for `configArrayFactory`, file
enumeration will encounter the exception that was reported in #13789.

From the perspective of ESLint core, the default value for
`configArrayFactory` is dead code. However, even though `FileEnumerator`
is an undocumented API, it's called by `eslint-plugin-import`'s
`no-unused-modules` rule, which hits the exception reproduced by this
test.

lib/cli-engine/file-enumerator.js

@@ -213,7 +213,11 @@ class FileEnumerator {
      */
     constructor({
         cwd = process.cwd(),
-        configArrayFactory = new CascadingConfigArrayFactory({ cwd }),
+        configArrayFactory = new CascadingConfigArrayFactory({
+            cwd,
+            eslintRecommendedPath: path.resolve(__dirname, "../../conf/eslint-recommended.js"),
+            eslintAllPath: path.resolve(__dirname, "../../conf/eslint-all.js")
+        }),
         extensions = null,
         globInputPaths = true,
         errorOnUnmatchedPattern = true,