workflow: Add clang-tidy review workflow

Add clang-tidy review workflow

Signed-off-by: Balaji Srinivasan <balaji.srinivasan@nordicsemi.no>

.github/workflows/clang-tidy-review.yml

@@ -0,0 +1,63 @@
+name: Clang-tidy review
+on:
+  pull_request:
+
+jobs:
+  build:
+    name: Clang tidy review
+    runs-on: ubuntu-latest
+    container: zephyrprojectrtos/ci:v0.26.4
+    env:
+      CMAKE_PREFIX_PATH: /opt/toolchains
+    steps:
+      - name: Checkout the code
+        uses: actions/checkout@v2
+        if: github.event_name == 'pull_request_target'
+        with:
+          ref: ${{ github.event.pull_request.head.sha  }} # Checkout the PR's head sha instead of the target branch's sha
+          path: ncs/nrf
+          fetch-depth: 0
+
+      - name: Checkout the code
+        uses: actions/checkout@v2
+        if: github.event_name != 'pull_request_target'
+        with:
+          path: ncs/nrf
+          fetch-depth: 0
+
+      - name: Install jq
+        run: |
+          sudo apt-get update
+          sudo apt-get install jq
+
+      # The docker image comes pre-initialized with west dependencies. We want to do west update ourselves to to be sure that we get the latest changes in all repos.
+      # The docker image is built nightly. So it may contain slightly out of date repos.
+      # Hence we remove the .west folder and do a re-init
+      - name: West init and update
+        run: |
+          rm -rf /workdir/.west/
+          west init -l ncs/nrf
+          cd ncs
+          west update --narrow -o=--depth=1
+
+      # Download the quarantine file base branch. This is needed to build and run the tests.
+      - name: Download quarentine file from nrf (PR only)
+        if: github.event_name == 'pull_request_target'
+        run: |
+          wget https://raw.githubusercontent.com/balaji-nordic/sdk-nrf/master/scripts/quarantine_downstream.yaml -P ncs/nrf/scripts/
+
+      - name: Build native_posix tests (via sonarcloud build wrapper)
+        shell: bash
+        run: |
+          source ncs/zephyr/zephyr-env.sh
+          ncs/zephyr/scripts/twister -b -v -i -T ncs/nrf/applications/asset_tracker_v2 -p native_posix --quarantine-list ncs/nrf/scripts/quarantine_downstream.yaml
+
+      - name: Use jq to combine compile_commands.json files
+        run: |
+          jq -s 'map(.[])' twister-out/**/compile_commands.json > compile_commands.json
+
+      - uses: ZedThree/clang-tidy-review@v0.12.0
+        with:
+          split_workflow: true
+
+      - uses: ZedThree/clang-tidy-review/upload@v0.12.0