Update nested objects on parent labels update

[zhiltsov-max]

Motivation and context

Fixes #6871

• Added batch update (note - no signals issued on this) for owning and nested objects (tasks, jobs) on parent (task, project) labels updates

How has this been tested?

Checklist

• I submit my changes into the develop branch
• I have created a changelog fragment
• 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 #6958 (e8f71d3) into develop (8197cd2) will increase coverage by 0.00%.
Report is 1 commits behind head on develop.
The diff coverage is 100.00%.

@@           Coverage Diff            @@
##           develop    #6958   +/-   ##
========================================
  Coverage    82.33%   82.33%           
========================================
  Files          361      361           
  Lines        39171    39190   +19     
  Branches      3586     3586           
========================================
+ Hits         32251    32268   +17     
- Misses        6920     6922    +2     

Components	Coverage Δ
cvat-ui	77.28% <ø> (-0.03%)	⬇️
cvat-server	86.97% <100.00%> (+0.02%)	⬆️

[SpecLad]

Please add a changelog entry.