fix: DEV-2367: User is able to edit Time Series results imported as read-only

[yyassi-heartex]

resolving a readonly region issue where it was still possible to edit the region. removed handles when RO

[codecov]

Codecov Report

Merging #2444 (4135937) into develop (17b40da) will decrease coverage by 0.39%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #2444      +/-   ##
===========================================
- Coverage    77.80%   77.40%   -0.40%     
===========================================
  Files          137      141       +4     
  Lines         9951    10242     +291     
===========================================
+ Hits          7742     7928     +186     
- Misses        2209     2314     +105     

Impacted Files	Coverage Δ
label_studio/label_studio/users/mixins.py	75.00% <0.00%> (-12.50%)	⬇️
...bel_studio/label_studio/organizations/functions.py	66.66% <0.00%> (-10.26%)	⬇️
label_studio/label_studio/users/forms.py	87.09% <0.00%> (-2.38%)	⬇️
label_studio/label_studio/tasks/serializers.py	84.27% <0.00%> (-2.27%)	⬇️
label_studio/label_studio/tasks/models.py	87.85% <0.00%> (-2.20%)	⬇️
...abel_studio/label_studio/data_manager/functions.py	64.70% <0.00%> (-1.97%)	⬇️
label_studio/label_studio/core/label_config.py	71.54% <0.00%> (-1.85%)	⬇️
label_studio/label_studio/data_manager/managers.py	80.17% <0.00%> (-1.54%)	⬇️
.../label_studio/data_manager/actions/experimental.py	18.62% <0.00%> (-0.89%)	⬇️
label_studio/label_studio/core/redis.py	43.33% <0.00%> (-0.74%)	⬇️
... and 32 more

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