ci: adds k3s runner and k3s binary in release workflow

.github/workflows/release.yml

@@ -85,3 +85,98 @@ jobs:
       #     builds_iac_job: ${{ matrix.name == 'iac-job' }}
       #     builds_aws_spot_node_terminator: ${{ matrix.name == 'aws-spot-node-terminator' }}
       #     builds_gcp_spot_node_terminator: ${{ matrix.name == 'gcp-spot-node-terminator' }}
+
+  build-k3s-runner-and-binary:
+    runs-on: ubuntu-latest
+    env:
+      k3s_version: "v1.30.5+k3s1"
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: setup nix (with cachix)
+        uses: kloudlite/actions/setup-nix-cachix@v1
+        with:
+          flake_lock: ${{ inputs.working_directory }}/flake.lock
+          nix_develop_arguments: ${{ inputs.working_directory }}#default
+
+          cachix_cache_name: ${{ secrets.CACHIX_CACHE_NAME }}
+          cachix_auth_token: ${{ secrets.CACHIX_AUTH_TOKEN }}
+
+      - name: build k3s runner
+        shell: bash
+        working-directory: ./${{ env.SUBMODULE }}/cmd/k3s-runner
+        run: |+
+          GOARCH=amd64 task build
+          GOARCH=arm64 task build
+
+      - name: download supported k3s binary
+        shell: bash
+        run: |+
+          curl -L0 "https://github.com/k3s-io/k3s/releases/download/$k3s_version/k3s" > bin/k3s-amd64
+          curl -L0 "https://github.com/k3s-io/k3s/releases/download/$k3s_version/k3s-arm64" > bin/k3s-arm64
+
+      - name: Upload Artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: k3s
+          path: bin/*
+
+  releasing-binaries:
+    runs-on: ubuntu-latest
+    needs: build-k3s-runner-and-binary 
+    steps:
+      - name: Download all artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: ${{ github.workspace }}/binaries
+          pattern: "k3s-*"
+
+      - name: flattening all the artifacts
+        shell: bash
+        run: |+
+          ls -R ${{ github.workspace }}/binaries
+          mkdir -p  ${{ github.workspace }}/upload/binaries
+          shopt -s globstar
+          file ./** | grep 'executable,' | awk -F: '{print $1}' | xargs -I {} cp {} ${{ github.workspace }}/upload/binaries
+          shopt -u globstar
+
+      - uses: nxtcoder17/actions/generate-image-tag@v1
+        id: tag_name
+
+      - name: running for master branch
+        if: startsWith(github.ref, 'refs/heads/master')
+        run: |+
+          echo "IMAGE_TAG=nightly" | tee -a $GITHUB_ENV | tee -a $GITHUB_OUTPUT
+
+      - name: ensure github release exists
+        shell: bash
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |+
+          set +e
+          gh release list -R ${{ github.repository }}  | grep -i $IMAGE_TAG
+          exit_code=$?
+          if [ $exit_code -ne 0 ]; then
+            gh release create $IMAGE_TAG -R ${{ github.repository }} --generate-notes --prerelease --draft=false
+          fi
+
+      - name: upload to github release
+        shell: bash
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |+
+          extra_args=""
+          if [ "$IMAGE_TAG" = "nightly" ]; then
+            extra_args="--clobber"
+          fi
+          gh release upload $IMAGE_TAG -R ${{github.repository}} $extra_args ${{github.workspace}}/upload/binaries/*
+
+      - name: mark release as latest
+        if: startsWith(github.ref, 'refs/tags/')
+        env:
+          GH_TOKEN: ${{ github.token }}
+        shell: bash
+        run: |+
+          gh release edit $IMAGE_TAG -R ${{ github.repository }} --latest
+