fix: custom row loading on many tabs

[soleksy-splunk]

Issue number: https://splunk.atlassian.net/browse/ADDON-75045

Summary

fixes issue that for every tab custom row was loaded from inputs.table object

add tab for configuration page with custom rows

Changes

Please provide a summary of what's being changed

User experience

custom rows for config page should work right now

Please describe what the user experience looks like before and after this change

Checklist

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• [ ] I have performed a self-review of this change
• [ ] Changes have been tested
• [x] Changes are documented
• [x] PR title follows conventional commit semantics