Refactor github actions and add copycat (#10215)

* add actions

* disable copycat, fix action location

* dont look for env for token

.github/workflows/on-pr-open.yml

@@ -0,0 +1,23 @@
+name: On PR Open
+on:
+  pull_request:
+    branches:
+      - release/**
+
+jobs:
+  main:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Actions
+        uses: actions/checkout@v2
+        with:
+          repository: 'microsoft/azuredatastudio'
+          ref: master
+          path: ./actions
+      - name: Install Actions
+        run: npm install --production --prefix ./actions/build/actions
+
+      - name: Run Port Labeler
+        uses: ./actions/auto-labeler
+        with:
+          label: "Port Request"