skips 'config_open.ts' files from linter check (#60248) (#60267)

Author: MadameSheema

.eslintrc.js

@@ -326,6 +326,7 @@ module.exports = {
         'x-pack/test/functional/apps/**/*.js',
         'x-pack/legacy/plugins/apm/**/*.js',
         'test/*/config.ts',
+        'test/*/config_open.ts',
         'test/*/{tests,test_suites,apis,apps}/**/*',
         'test/visual_regression/tests/**/*',
         'x-pack/test/*/{tests,test_suites,apis,apps}/**/*',