release: Copy the VERSION file to the tarball

For the release itself, let's simply copy the VERSION file to the
tarball.

To do so, we had to change the logic that merges the build, as at that
point the tag is not yet pushed to the repo.

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

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

@@ -343,6 +343,8 @@ jobs:
       - name: merge-artifacts
         run: |
           ./tools/packaging/kata-deploy/local-build/kata-deploy-merge-builds.sh kata-artifacts versions.yaml
+        env:
+          RELEASE: ${{ inputs.stage == 'release' && 'yes' || 'no' }}
       - name: store-artifacts
         uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:

.github/workflows/build-kata-static-tarball-arm64.yaml

@@ -313,6 +313,8 @@ jobs:
       - name: merge-artifacts
         run: |
           ./tools/packaging/kata-deploy/local-build/kata-deploy-merge-builds.sh kata-artifacts versions.yaml
+        env:
+          RELEASE: ${{ inputs.stage == 'release' && 'yes' || 'no' }}
       - name: store-artifacts
         uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:

.github/workflows/build-kata-static-tarball-ppc64le.yaml

@@ -256,6 +256,8 @@ jobs:
       - name: merge-artifacts
         run: |
           ./tools/packaging/kata-deploy/local-build/kata-deploy-merge-builds.sh kata-artifacts versions.yaml
+        env:
+          RELEASE: ${{ inputs.stage == 'release' && 'yes' || 'no' }}
       - name: store-artifacts
         uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:

.github/workflows/build-kata-static-tarball-s390x.yaml

@@ -342,6 +342,8 @@ jobs:
       - name: merge-artifacts
         run: |
           ./tools/packaging/kata-deploy/local-build/kata-deploy-merge-builds.sh kata-artifacts versions.yaml
+        env:
+          RELEASE: ${{ inputs.stage == 'release' && 'yes' || 'no' }}
       - name: store-artifacts
         uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with: