fix(frontend): map dosing by group ID

[eatyourgreens]

When a CSV data file has no amount or administration ID columns, we want to map dosing compartments to the groups that were created during the Stratification step. Group IDs may not be integers, so can't be parsed with parseInt.

[sonarcloud[bot]]

Quality Gate passed for 'pkpdapp'

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[sonarcloud[bot]]

Quality Gate passed for 'pkpdapp-team_pkpdapp_frontend'

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov[bot]]

Codecov Report

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

Project coverage is 76.26%. Comparing base (28944d1) to head (591e1da). Report is 68 commits behind head on development.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## development #512 +/- ## =============================================== - Coverage 76.88% 76.26% -0.62% =============================================== Files 108 108 Lines 5593 5591 -2 =============================================== - Hits 4300 4264 -36 - Misses 1293 1327 +34 ```

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