ci/gha: add golangci-lint job

This is mostly to check pull requests in order to make maintainers'
jobs a tad easier.

Signed-off-by: Kir Kolyshkin <[email protected]>
Acked-by: Paul Moore <[email protected]>
Signed-off-by: Tom Hromatka <[email protected]>

Author: kolyshkin

.github/workflows/validate.yml

@@ -0,0 +1,27 @@
+name: validate
+on:
+  push:
+    tags:
+      - v*
+    branches:
+      - master
+      - main
+      - release-*
+  pull_request:
+
+jobs:
+
+  lint:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - name: install deps
+        run: |
+          sudo apt -q update
+          sudo apt -q install libseccomp-dev
+      - uses: golangci/golangci-lint-action@v2
+        with:
+          # must be specified without patch version
+          version: v1.41
+
+