[Gradle, JS] Refactor and extract team city formatting in separate file

libraries/tools/kotlin-test-js-runner/package.json

@@ -11,7 +11,7 @@
     "lib/**/*"
   ],
   "scripts": {
-    "build": "rimraf lib/* && rollup -c rollup.config.js && copyfiles \"karma-kotlin-reporter.js\" \"mocha-kotlin-reporter.js\" lib"
+    "build": "rimraf lib/* && rollup -c rollup.config.js"
   },
   "dependencies": {
     "@types/node": "^10.12.21",
@@ -19,7 +19,6 @@
     "browser-process-hrtime": "^1.0.0"
   },
   "devDependencies": {
-    "copyfiles": "^2.1.0",
     "rimraf": "^2.6.3",
     "rollup": "^1.1.2",
     "rollup-plugin-commonjs": "^9.2.0",