Remove: Removed the logic for the client certificates credential type.

[jhelmold]

What

The client certificates credential type logic has been removed.

The credentials of type "client certificate" are not touched and can still be accessed. But they
are of no use anymore. They can be deleted manually.

Why

The client certificates credential type was once used for (custom) OSP scanners,
a functionality that was removed with GOS 22.04.0. So it is not used any more and
it confused the users.

References

GEA-333

Checklist

Manually tested on my development environment.

• Tests

[github-actions]

Conventional Commits Report

Type	Number
Removed	1

🚀 Conventional commits found.

[codecov]

Codecov Report

Attention: 6 lines in your changes are missing coverage. Please review.

Comparison is base (6ade928) 59.99% compared to head (14bdbce) 59.95%.
Report is 1 commits behind head on main.

❗ Current head 14bdbce differs from pull request most recent head bc6d746. Consider uploading reports for the commit bc6d746 to get more accurate results

Files	Patch %	Lines
src/web/pages/scanners/component.js	0.00%	3 Missing ⚠️
src/web/pages/scanners/detailspage.js	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3903      +/-   ##
==========================================
- Coverage   59.99%   59.95%   -0.05%     
==========================================
  Files        1023     1022       -1     
  Lines       25174    25108      -66     
  Branches     7471     7438      -33     
==========================================
- Hits        15104    15053      -51     
+ Misses       9124     9110      -14     
+ Partials      946      945       -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[timopollmeier]

I think there are some parts of the code made obsolete by the removal that can still be cleaned up while in the tests there are still parts that should not have been removed, but adjusted to the changed credential type instead.