fix(lint_test_cases.sh): linting multi region yamls separately
fix(lint_test_cases.sh): linting multi region yamls separately

Since now gce_datacenter is a multi region params, the previous linting of the yaml
files failed, so I altered it to take the datacenter count into account

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