Increase token short length if it includes prefix
Related to https://gitlab.com/gitlab-org/security/gitlab/-/merge_requests/2251
This MR increases the length of the short version of the token in order to accommodate the runner token prefix added by https://gitlab.com/gitlab-org/security/gitlab/-/merge_requests/2251. Without this MR, all tokens in logs will look the same, showing only the common prefix.
Closes #28944 (closed)
Edited by Pedro Pombeiro