chore: Move useOnUnmount to dataModelling

[wrt95]

Description

• only used in datamodelling, so it is moved there

Related Issue(s)

• Move useOnUnmount to dataModelling #13870

Verification

• Your code builds clean without any errors or warnings
• Manual testing done (required)
• Relevant automated test added (if you find this hard, leave it and we'll help out)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.29%. Comparing base (9ec0e3b) to head (fe177fe).
Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #13911      +/-   ##
==========================================
- Coverage   95.29%   95.29%   -0.01%     
==========================================
  Files        1653     1651       -2     
  Lines       22030    22025       -5     
  Branches     2594     2595       +1     
==========================================
- Hits        20994    20989       -5     
  Misses        790      790              
  Partials      246      246              

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