gitlab: Add cross-arm64-kvm-only

We are not currently running a --disable-tcg test for arm64,
like we are for mips, ppc and s390x.  We have a job for the
native aarch64 runner, but it is not run by default and it
is not helpful for normal developer testing without access
to qemu's private runner.

Use --without-default-features to eliminate most tests.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

.gitlab-ci.d/crossbuilds.yml

@@ -29,6 +29,14 @@ cross-arm64-user:
   variables:
     IMAGE: debian-arm64-cross
 
+cross-arm64-kvm-only:
+  extends: .cross_accel_build_job
+  needs:
+    job: arm64-debian-cross-container
+  variables:
+    IMAGE: debian-arm64-cross
+    EXTRA_CONFIGURE_OPTS: --disable-tcg --without-default-features
+
 cross-i386-user:
   extends:
     - .cross_user_build_job