Use the new variable.

Blocked by -> https://gitlab.com/redhat/centos-stream/tests/kernel/kpet-db/-/issues/97

Review the project, but at least we're using CKI_ID to identify a cki test in:

• https://gitlab.com/cki-project/cki-tools/-/blob/main/cki/kcidb/beaker_to_kcidb.py#L29
• https://gitlab.com/cki-project/cki-tools/-/blob/main/cki/cki_tools/filter_bkr_task.py#L25

Jira: CKI-6606(https://issues.redhat.com/browse/CKI-6606)