chore(buildtools): enable --frozen-lockfile yarn flag (#1005)

that is required for reproducible dependencies which is usually common on CI

.github/workflows/detox.yml

       - name: Setup - Install Yarn
         run: YARN_GPG=NO curl -o- -L https://yarnpkg.com/install.sh | bash
       - name: Setup - Install NPM Dependencies
-        run: yarn
+        run: yarn --frozen-lockfile
       - name: Setup - Install CocoaPods CLI
         run: sudo gem install cocoapods -v 1.8.4
       - name: Run tests