gha: Split payload-after-push-*.yaml

Let's split those actions into two different ones:
* Build the kata-static tarball
* Publish the kata-deploy payload

We're doing this as, later in this series we'll start taking advantage
of both pieces.

Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>

.github/workflows/build-kata-static-tarball-amd64.yaml

@@ -0,0 +1,67 @@
+name: CI | Build kata-static tarball for amd64
+on:
+  workflow_call:
+    inputs:
+      tarball-suffix:
+        required: false
+        type: string
+
+jobs:
+  build-asset:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        asset:
+          - cloud-hypervisor
+          - firecracker
+          - kernel
+          - kernel-dragonball-experimental
+          - nydus
+          - qemu
+          - rootfs-image
+          - rootfs-initrd
+          - shim-v2
+          - virtiofsd
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0 # This is needed in order to keep the commit ids history
+      - name: Build ${{ matrix.asset }}
+        run: |
+          make "${KATA_ASSET}-tarball"
+          build_dir=$(readlink -f build)
+          # store-artifact does not work with symlink
+          sudo cp -r "${build_dir}" "kata-build"
+        env:
+          KATA_ASSET: ${{ matrix.asset }}
+          TAR_OUTPUT: ${{ matrix.asset }}.tar.gz
+          PUSH_TO_REGISTRY: yes
+
+      - name: store-artifact ${{ matrix.asset }}
+        uses: actions/upload-artifact@v3
+        with:
+          name: kata-artifacts-amd64${{ inputs.tarball-suffix }}
+          path: kata-build/kata-static-${{ matrix.asset }}.tar.xz
+          retention-days: 1
+          if-no-files-found: error
+
+  create-kata-tarball:
+    runs-on: ubuntu-latest
+    needs: build-asset
+    steps:
+      - uses: actions/checkout@v3
+      - name: get-artifacts
+        uses: actions/download-artifact@v3
+        with:
+          name: kata-artifacts-amd64${{ inputs.tarball-suffix }}
+          path: kata-artifacts
+      - name: merge-artifacts
+        run: |
+          ./tools/packaging/kata-deploy/local-build/kata-deploy-merge-builds.sh kata-artifacts
+      - name: store-artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: kata-static-tarball-amd64${{ inputs.tarball-suffix }}
+          path: kata-static.tar.xz
+          retention-days: 1
+          if-no-files-found: error