ci: check proto format

This patch enables CI for proto files.

Author: ImeevMA

.github/workflows/lint.yaml

@@ -0,0 +1,36 @@
+name: lint
+
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - '**'
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  protobuf:
+    runs-on: ubuntu-20.04-self-hosted
+    container:
+      image: docker.io/tarantool/testing:ubuntu-focal
+
+    steps:
+      - name: Prepare checkout
+        uses: tarantool/actions/prepare-checkout@master
+
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Install clang-format
+        run: |
+          apt-get update
+          apt-get -y install clang-format
+
+      - name: Generate make files
+        run: cmake .
+
+      - name: Checking protobuf syntax
+        run: clang-format --dry-run --verbose -Werror *.proto