Prepare documentation to be updated
What does this MR do?
Patch releases have been repurposed as releases that include bug and security fixes. This commit prepares documentation to be updated by:
- Renaming
security/process.md
tosecurity/readme.md
- Creating a dedicated page for the security terminology
- Renaming
security/developer.md
tosecurity/engineer.md
, as the latter is the GitLab role. - Removes old unused page
patch/process_new.md