CI: Force git clone to avoid odd git and repo problems

Signed-off-by: Esben Haabendal <esben.haabendal@huawei.com>

.gitlab-ci.yml

@@ -39,6 +39,8 @@ include:
  - local: '.gitlab-ci/container.yml'
 
 variables:
+  # Force the use of git clone to avoid odd git and repo problems
+  GIT_STRATEGY: "clone"
   # output upload and download progress every 10 seconds
   TRANSFER_METER_FREQUENCY: "10s"
   # Use no compression for artifacts