[frontend] use context to prefill the dynamic entity mapping column

[CelineSebe]

Proposed changes

• add CsvMapperContext to pass the dynamicMappingColumn to the others representation
• add useEffect to set the new column_reference or the dynamicMappingColumn
• add useState to modify the value of the dynamicMappingColumn

Related issues

• 7400

Checklist

• [x] I consider the submitted work as finished
• [x] I tested the code for its functionality
• [ ] I wrote test cases for the relevant uses case (coverage and e2e)
• [x] I added/update the relevant documentation (either on github or on notion)
• [x] Where necessary I refactored code to improve the overall quality

Further comments

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 64.68%. Comparing base (d3a85de) to head (2f4cf7d).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #9087 +/- ## ======================================= Coverage 64.68% 64.68% ======================================= Files 620 620 Lines 59208 59208 Branches 6520 6520 ======================================= Hits 38301 38301 Misses 20907 20907 ```

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