CI: Define XEN_REGISTRY variable

This allow to change the registry used for container in a single
place, and could be controlled via other mean.

Signed-off-by: Anthony PERARD <anthony.perard@vates.tech>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>

.gitlab-ci.yml

@@ -1,3 +1,6 @@
+variables:
+  XEN_REGISTRY: registry.gitlab.com/xen-project/xen
+
 workflow:
   rules:
     - if: $CI_COMMIT_BRANCH =~ /^(master|smoke|^coverity-tested\/.*|stable-.*)$/

automation/gitlab-ci/build.yaml

@@ -1,6 +1,6 @@
 .build-tmpl: &build
   stage: build
-  image: registry.gitlab.com/xen-project/xen/${CONTAINER}
+  image: ${XEN_REGISTRY}/${CONTAINER}
   script:
     - ./automation/scripts/build 2>&1 | tee build.log
   artifacts:
@@ -208,7 +208,7 @@
 
 .yocto-test:
   stage: build
-  image: registry.gitlab.com/xen-project/xen/${CONTAINER}
+  image: ${XEN_REGISTRY}/${CONTAINER}
   script:
     - ./automation/build/yocto/build-yocto.sh -v --log-dir=./logs --xen-dir=`pwd` ${YOCTO_BOARD} ${YOCTO_OUTPUT}
   variables:

automation/gitlab-ci/test.yaml

@@ -1,6 +1,6 @@
 .test-jobs-common:
   stage: test
-  image: registry.gitlab.com/xen-project/xen/${CONTAINER}
+  image: ${XEN_REGISTRY}/${CONTAINER}
 
 .arm64-test-needs: &arm64-test-needs
   - alpine-3.18-arm64-rootfs-export