Use updated git cache dir default path

This was updated in the release repo with [0] but missed to update in
this copy here.

[0] I7c3ed1e08c7ef1a62845df0d9c5b22f400d8d90b

Change-Id: If45f95cf530984240b9999f06b28c2602b03ab26

roles/copy-release-tools-scripts/files/release-tools/clone_repo.sh

@@ -155,7 +155,7 @@ function retry {
 set -x
 set -e
 
-cache_remote="$CACHE_DIR/$REPO"
+cache_remote="$CACHE_DIR/opendev.org/$REPO"
 if [ ! -d "$cache_remote" ]; then
     echo "WARNING: Cache directory $cache_remote does not exist, ignoring."
     cache_remote=""