feat: Experimental feature Add data field or Add tags or Modify fields

[makseq]

This PR adds the Add Or Modify Data Field action in the Data Manager. You can filter some tasks and then add data fields to them. Then you will be able to filter out by these new fields.

To enable this functionality, run LS like this:

EXPERIMENTAL_FEATURES=1 label-studio

Number

Add new data field with float value.

String

Add new data field with string value.

Expressions

permutative sampling:

sample()

> sample()  # => if N_tasks=4 => 4, 1, 3, 2 

uniform random from min integer to max integer:

random(<min_int>, <max_int>)

> random(1, 3)  # => 1, 3, 2, ..., N_tasks

random sampling for string or integer choices with weights:

choices(["<value1>", "<value2>", ...], [<weight1>, <weight2>, ...])

> choices(["a", "b"], [0.4, 0.6])  # => "a", "b", "b", "b", ..., N_tasks

# split dataset into train/test/valid subsets with weights train=90%, test=5%, validation=5%
> choices(['train', 'test', 'valid'], [0.9, 0.05, 0.05])  

replace old substring to the new substring:

replace("old-string", "new-string")

> replace("a", "b")  # => abc => bbc

[codecov]

Codecov Report

Merging #2558 (5bd4191) into develop (17b40da) will decrease coverage by 0.61%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #2558      +/-   ##
===========================================
- Coverage    77.80%   77.18%   -0.62%     
===========================================
  Files          137      141       +4     
  Lines         9951    10348     +397     
===========================================
+ Hits          7742     7987     +245     
- Misses        2209     2361     +152     

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%)	⬇️
...l_studio/label_studio/core/templatetags/filters.py	48.75% <0.00%> (-6.20%)	⬇️
label_studio/label_studio/users/api.py	80.45% <0.00%> (-3.88%)	⬇️
.../label_studio/data_manager/actions/experimental.py	16.23% <0.00%> (-3.28%)	⬇️
label_studio/label_studio/ml/serializers.py	92.30% <0.00%> (-2.43%)	⬇️
label_studio/label_studio/core/utils/contextlog.py	44.55% <0.00%> (-2.33%)	⬇️
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%)	⬇️
... and 50 more

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[hadiyouness10]

Hello, I added a new data field called random with an expression of random(min, max).
The column is added and the values are random as expected. However, when I try to sort, nothing changes

[hadiyouness10]

It seems that adding images using the upload button and then creates the data field works fine. However, adding data using the cloud storage (locally) and then creating the data field doesn't allow ordering or filtering on the created field