fix: OPTIC-1341: Filtering on data fields is not working when $undefined$ and other columns in task data

[makseq]

Change has impacts in these area(s)

(check all that apply)

• Product design
• Backend (Database)
• Backend (API)
• Frontend

Problem

Data manager filtering does not work for columns different from those in the label config when $undefined$ is in the task data.

Steps to reproduce

Import 2 files (e.g. image) without settings labeling config. You will get 2 tasks.

Patch the first task only with new fields, e.g. add some_value: "my-data" column.

Try using filters by some_value in the data manager, you will see “not found” even if you try to search for “my-data”.

It happens, because the data manager engine forces to use $undefined$ column for search.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.70%. Comparing base (e6e68f0) to head (bb5f240).
Report is 29 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #6641      +/-   ##
===========================================
+ Coverage    76.67%   76.70%   +0.02%     
===========================================
  Files          169      169              
  Lines        13844    13853       +9     
===========================================
+ Hits         10615    10626      +11     
+ Misses        3229     3227       -2     

Flag	Coverage Δ
pytests	76.70% <100.00%> (+0.02%)	⬆️

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