Trusted-Contributors don't have permission to escalate tasks as security issues, but should per the summary of rPHEXf951c8bfa70a: Lock down the 'lock as security issue' feature.

Steps to reproduce (as non- WMF-NDA or acl*sre-team):

1. Go to any task not authored by yourself that is not already a security issue
2. Click Protect as security issue

Expected: Dialog to escalate the task

Actual: No Permission error: You do not have permission to escalate tasks as security issues. This action can only be taken by authorized users.