Add generate-tests-apt-arm64-hmi-rpi64-rpi4

To ensure the job to test ARM64 HMI images on RPI4
can be generated.

Signed-off-by: Dylan Aïssi <dylan.aissi@collabora.com>

.gitlab-ci.yml

@@ -139,6 +139,12 @@ generate-tests-apt-armhf-hmi-uboot:
     - .armhf-uboot
     - .hmi
 
+generate-tests-apt-arm64-hmi-rpi64-rpi4:
+  extends:
+    - .generate-tests-apt
+    - .arm64-rpi64
+    - .hmi
+
 generate-tests-apt-amd64-basesdk-sdk:
   extends:
     - .generate-tests-apt