Show name of owner for public filters

[johannaengland]

Scope and purpose

Fixes #1748.

Screenshots:
Before:

After:

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• Added a changelog fragment for towncrier
• Added/amended tests for new/changed code
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• If this results in changes in the UI: Added screenshots of the before and after
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[codecov]

Codecov Report

❌ Patch coverage is 84.61538% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 84.58%. Comparing base (44b19cd) to head (2ac9a22).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/argus/htmx/incident/filter.py	33.33%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1810      +/-   ##
==========================================
+ Coverage   84.57%   84.58%   +0.01%     
==========================================
  Files         136      136              
  Lines        6619     6630      +11     
==========================================
+ Hits         5598     5608      +10     
- Misses       1021     1022       +1     

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[Simrayz]

I don't think that this design separates the user login from the filter name clearly enough. We already have a pattern in the PM Task form, maybe use that instead? I.e. <filter name> (<username>). Thisclearly shows that the filter owner is secondary (but important to distinguish similar results)

[Simrayz]

Nice 😄

[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