fix(azure-list-images): skip manually created images
fix(azure-list-images): skip manually created images

When scylla image is built manually, build_id gets date
as build_id (could be also something else). In that case
we don't want to use this image in SCT when specifying
Scylla version.

Fix by skipping images when we cannot parse build_id as int.

scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests