jenkins: Disable Alpine cloud builds on riscv64

Signed-off-by: Stéphane Graber <stgraber@stgraber.org>

Author: stgraber

jenkins/jobs/image-alpine.yaml

@@ -32,6 +32,9 @@
         - cloud
         - tinycloud
 
+    execution-strategy:
+      combination-filter: '!(architecture=="riscv64" && variant == "cloud" && release == "edge")'
+
     builders:
     - shell: |-
         cd /lxc-ci