Add admin action for easy deactivation of users

[pktiuk]

Minor quality of life improvement which helps managing status of users.

Motivation and context

I find this change very useful in my organization, so maybe upstream will also find it useful. :)

How has this been tested?

Built and launched an instance with this change

Checklist

• I submit my changes into the develop branch
• I have added a description of my changes into the CHANGELOG file
  - [ ] I have updated the documentation accordingly
  - [ ] I have added tests to cover my changes
  - [ ] I have linked related issues (see GitHub docs)
  - [ ] I have increased versions of npm packages if it is necessary
  (cvat-canvas,
  cvat-core,
  cvat-data and
  cvat-ui)

License

• I submit my code changes under the same MIT License that covers the project.
  Feel free to contact the maintainers if that's a concern.

[codecov]

Codecov Report

Merging #6314 (a761c3c) into develop (2896bec) will decrease coverage by 2.08%.
The diff coverage is 71.42%.

❗ Current head a761c3c differs from pull request most recent head dc01e36. Consider uploading reports for the commit dc01e36 to get more accurate results

@@             Coverage Diff             @@
##           develop    #6314      +/-   ##
===========================================
- Coverage    81.76%   79.69%   -2.08%     
===========================================
  Files          337      320      -17     
  Lines        38525    37247    -1278     
  Branches      3547     6744    +3197     
===========================================
- Hits         31501    29683    -1818     
- Misses        7024     7286     +262     
- Partials         0      278     +278     

Components	Coverage Δ
cvat-ui	77.09% <ø> (+1.86%)	⬆️
cvat-server	82.04% <71.42%> (-5.77%)	⬇️

[Marishka17]

LGTM