GraphQL: Rename RunnerMembershipFilter to CiRunnerMembershipFilter

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/119185



Merged-by: Fiona Neill <fneill@gitlab.com>
Approved-by: Fiona Neill <fneill@gitlab.com>
Approved-by: Darren Eastman <deastman@gitlab.com>
Reviewed-by: Pedro Pombeiro <noreply@pedro.pombei.ro>
Reviewed-by: Fiona Neill <fneill@gitlab.com>
Co-authored-by: Pedro Pombeiro <noreply@pedro.pombei.ro>