Added parallelism to pubsub workflow

Signed-off-by: Amulya Varote <amulyavarote@microsoft.com>

.github/workflows/validate_new_quickstarts_pubsub.yaml

@@ -28,10 +28,11 @@ on:
       - feature/new_quickstarts
       - release-*
 jobs:
-  deploy:
-    name: Validate quickstarts on ${{ matrix.os }}
+  validate:
+    name: Validate quickstart for `${{ matrix.quickstart_language }}` with `${{ matrix.quickstart_variant }}` on ${{ matrix.os }}
     runs-on: ${{ matrix.os }}
     env:
+      DAPR_DEFAULT_IMAGE_REGISTRY: GHCR
       DAPR_INSTALL_URL: https://raw.githubusercontent.com/dapr/cli/master/install
       GOVER: 1.17
       KUBERNETES_VERSION: v1.21.1
@@ -40,13 +41,18 @@ jobs:
     strategy:
       matrix: 
         os: [ubuntu-latest, macos-10.15]
+        quickstart_language: [go, javascript, python, java]
+        quickstart_variant: [http, sdk]
     steps:
       - name: Install docker - MacOS
         if: matrix.os == 'macos-10.15'
-        uses: docker-practice/actions-setup-docker@v1
-        with:
-          docker_buildx: false
-          docker_version: 20.10
+        run: |
+          /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"
+          brew install --cask docker
+          sudo /Applications/Docker.app/Contents/MacOS/Docker --unattended --install-privileged-components
+          open -a /Applications/Docker.app --args --unattended --accept-license
+          while ! /Applications/Docker.app/Contents/Resources/bin/docker info &>/dev/null; do sleep 1; done
+          docker --version
       - name: Set up Go ${{ env.GOVER }}
         uses: actions/setup-go@v2
         with:
@@ -86,46 +92,17 @@ jobs:
           echo "PATH=$PATH:$HOME/.local/bin" >> $GITHUB_ENV
           pip3 install setuptools wheel
           pip3 install mechanical-markdown
-      - name: Validate Go http pubsub
+      - name: Validate ${{ matrix.quickstart_language }} ${{ matrix.quickstart_variant }} pubsub
         run: |
-          pushd pub_sub/go/http
-          make validate
-          popd
-      - name: Validate Go sdk pubsub
-        run: |
-          pushd pub_sub/go/sdk
-          make validate
-          popd
-      - name: Validate JS http pubsub
-        run: |
-          pushd pub_sub/javascript/http
-          make validate
-          popd
-      - name: Validate JS sdk pubsub
-        run: |
-          pushd pub_sub/javascript/sdk
-          make validate
-          popd
-      - name: Validate python http pubsub
-        run: |
-          pushd pub_sub/python/http
-          make validate
-          popd
-      - name: Validate python sdk pubsub
-        run: |
-          pushd pub_sub/python/sdk
-          make validate
-          popd
-      - name: Validate java http pubsub
-        run: |
-          pushd pub_sub/java/http
-          make validate
-          popd
-      - name: Validate java sdk pubsub
-        run: |
-          pushd pub_sub/java/sdk
+          pushd pub_sub/${{ matrix.quickstart_language }}/${{ matrix.quickstart_variant }}
           make validate
           popd
+  link-check:
+    name: Validating links
+    runs-on: ubuntu-latest
+    needs:
+      - validate
+    steps:
       - name: Linkcheck README.md
         run: |
-          make validate        
+          make validate