Make alert profiles match value dropdown lists searchable using select2

[lunkwill42]

This makes multiple choice drop down lists in Alert Profiles filter searchable using select2, which makes it a lot easier to find desired values when the choice lists become huge.

Fixes #3238

Url: http://localhost/alertprofiles/filters/add-expression/

Screenshot

[sonarcloud]

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]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ PYTHON	black	991		0	12.77s
✅ PYTHON	ruff	987		0	0.1s

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[github-actions]

Test results

    9 files      9 suites   8m 23s ⏱️
2 139 tests 2 139 ✅ 0 💤 0 ❌
4 017 runs  4 017 ✅ 0 💤 0 ❌

Results for commit 694461e.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 60.39%. Comparing base (27b12b5) to head (694461e).
Report is 29 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3240   +/-   ##
=======================================
  Coverage   60.39%   60.39%           
=======================================
  Files         605      605           
  Lines       43687    43684    -3     
  Branches       48       48           
=======================================
- Hits        26383    26382    -1     
+ Misses      17292    17290    -2     
  Partials       12       12           

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