[PM-36047] Add tech-leads group as owners of the CODEOWNERS file

[coltonhurst]

🎟️ Tracking

https://bitwarden.atlassian.net/browse/PM-36047

📔 Objective

For some existing repositories, there is no owner for the CODEOWNERS file itself. This presents a couple of concerns. The main initial concern is that a team’s ownership can change without them knowing or being approvers of the change.

This could be fixed in multiple ways, but two were discussed:

1. CODEOWNERS changes require approval from all teams whose ownership is changing. This is the better solution, but GitHub doesn’t seem to provide this capability. Something custom would have to be created, so this option is more effort.
2. CODEOWNERS changes require approval from the Tech Lead group. This is a less ideal solution compared to #1, but it should help provide more approval from the tech lead owners of files, and give them notifications on any changes.

For now, this change goes route #2. We aim to apply these changes only on monorepos. Team specific repositories shouldn't have this change.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

Checkmarx One – Scan Summary & Details – 9a363e33-c744-4fbb-958c-6d16084b7c39

Great job! No new security vulnerabilities introduced in this pull request

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 59.36%. Comparing base (c281161) to head (62a6020).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7562      +/-   ##
==========================================
- Coverage   63.81%   59.36%   -4.46%     
==========================================
  Files        2087     2087              
  Lines       92262    92262              
  Branches     8200     8200              
==========================================
- Hits        58880    54769    -4111     
- Misses      31356    35554    +4198     
+ Partials     2026     1939      -87     

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