feat: add action plugin workflow

.github/workflows/release.yaml

@@ -3,7 +3,7 @@ name: Release
 on:
   push:
     tags:
-      - 'v*'
+      - "v*"
 
 jobs:
   release:

.github/workflows/release_cortex_provider_plugin.yaml

@@ -0,0 +1,30 @@
+name: Release Cortex plugin
+
+on:
+  workflow_dispatch:
+  push:
+    tags:
+      - "plugin-v*"
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Go 1.x
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.18
+        id: go
+      - name: Check out code into the Go module directory
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: Run GoReleaser
+        uses: goreleaser/goreleaser-action@v4
+        with:
+          distribution: goreleaser
+          version: latest
+          args: release --clean
+          workdir: ${{ github.workspace }}/plugins/providers/cortex
+        env:
+          GITHUB_TOKEN: ${{ secrets.GO_RELEASER_TOKEN }}