Fix eslint broken for Jest

**What happened?**
Previously we just checked the immediate parent
to see if the module was being included from eslint.
Now we recursively check all the parents.

Also moves this eslint check to it's own config/helper

config/helpers/is_eslint.js

+/**
+ * Returns true if the given module is required from eslint
+ */
+const isESLint = mod => {
+  let parent = mod.parent;
+
+  while (parent) {
+    if (parent.filename.includes('/eslint')) {
+      return true;
+    }
+
+    parent = parent.parent;
+  }
+
+  return false;
+};
+
+module.exports = isESLint;

jest.config.base.js

 const IS_EE = require('./config/helpers/is_ee_env');
+const isESLint = require('./config/helpers/is_eslint');
 
 module.exports = path => {
   const reporters = ['default'];
@@ -24,9 +25,7 @@ module.exports = path => {
 
   // workaround for eslint-import-resolver-jest only resolving in test files
   // see https://github.com/JoinColony/eslint-import-resolver-jest#note
-  const { filename: parentModuleName } = module.parent;
-  const isESLint = parentModuleName && parentModuleName.includes('/eslint-import-resolver-jest/');
-  if (isESLint) {
+  if (isESLint(module)) {
     testMatch = testMatch.map(path => path.replace('_spec.js', ''));
   }