Replace travis with github actions (#9641)

* Move outside of travis to Github actions

This will permit to have better integrated CI workflow than the previous
travis one.

.github/workflows/cpp_lint.yml

@@ -0,0 +1,53 @@
+name: cpp_lint
+
+# lint on c/cpp changes or workflow changes
+on:
+  push:
+    paths:
+      - 'lib/**.[ch]'
+      - 'lib/**.cpp'
+      - 'src/**.[ch]'
+      - 'src/**.cpp'
+      - '**/CMakeLists.txt'
+      - 'cmake/Modules/**'
+      - 'util/ci/**'
+      - '.github/workflows/**.yml'
+  pull_request:
+    paths:
+      - 'lib/**.[ch]'
+      - 'lib/**.cpp'
+      - 'src/**.[ch]'
+      - 'src/**.cpp'
+      - '**/CMakeLists.txt'
+      - 'cmake/Modules/**'
+      - 'util/ci/**'
+      - '.github/workflows/**.yml'
+
+jobs:
+  clang_format:
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install clang-format
+        run: |
+          sudo apt-get install ${CLANG_FORMAT} -qyy
+        env:
+          CLANG_FORMAT: clang-format-9
+      - name: Run clang-format
+        run: |
+          source ./util/ci/lint.sh
+          perform_lint
+
+  clang_tidy:
+    runs-on: ubuntu-18.04
+    steps:
+    - uses: actions/checkout@v2
+    - name: Install clang-tidy
+      run: |
+        sudo apt-get install clang-tidy-9 -qyy
+        source ./util/ci/common.sh
+        install_linux_deps
+
+    - name: Run clang-tidy
+      run: |
+        ./util/ci/clang-tidy.sh