.github: add lint step (#31068)

.github/workflows/go.yml

@@ -8,6 +8,30 @@ on:
   workflow_dispatch:
 
 jobs:
+  lint:
+    name: Lint
+    runs-on: self-hosted
+    steps:
+    - uses: actions/checkout@v4
+
+    # Cache build tools to avoid downloading them each time
+    - uses: actions/cache@v4
+      with:
+        path: build/cache
+        key: ${{ runner.os }}-build-tools-cache-${{ hashFiles('build/checksums.txt') }}
+
+    - name: Set up Go
+      uses: actions/setup-go@v5
+      with:
+        go-version: 1.23.0
+        cache: false
+
+    - name: Run linters
+      run: |
+        go run build/ci.go lint
+        go run build/ci.go check_tidy
+        go run build/ci.go check_baddeps
+
   build:
     runs-on: self-hosted
     steps: