Fix Performance/StringInclude offenses

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/151303



Merged-by: Michael Kozono <mkozono@gitlab.com>
Approved-by: Bishwa Hang Rai <bhrai@gitlab.com>
Approved-by: Michael Kozono <mkozono@gitlab.com>
Reviewed-by: Bishwa Hang Rai <bhrai@gitlab.com>
Co-authored-by: Raj Sodhi <raj.sodhi@nyu.edu>