ci: build kata-ctl for arm64

kata-ctl was only produced as an amd64 tools asset; on arm64 the
build-tools-asset matrix built genpolicy alone, so no arm64 kata-ctl tarball
existed for the kata-deploy image to stage. Add kata-ctl to the arm64 tools
matrix so `kata-ctl exec` is available on arm64 nodes when debug is enabled.

Signed-off-by: Fabiano Fidêncio <ffidencio@nvidia.com>
Assisted-by: Cursor <cursoragent@cursor.com>

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

@@ -378,6 +378,7 @@ jobs:
       matrix:
         asset:
           - genpolicy
+          - kata-ctl
         stage:
           - ${{ inputs.stage }}
     steps: