Merge branch 'patch_rca_nil_job_last' into 'master'

Updating /troubleshoot rca to handle empty logs

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/160626



Merged-by: Rémy Coutable <remy@rymai.me>
Approved-by: Eva Kadlecová <ekadlecova@gitlab.com>
Approved-by: Rémy Coutable <remy@rymai.me>
Reviewed-by: Rémy Coutable <remy@rymai.me>
Co-authored-by: Max Fan <mfan@gitlab.com>