feat(custom_row): pass default row value to custom row component

[rohanm-crest]

**Issue number: ADDON-70909

Summary

Changes

Added the new method getDLRows in the custom row component for updating the custom values.
Updated the documentation to show the user can access the row fields in the custom row component.

User experience

User can select what to display in a custom row by selecting the render method or getDLRows method.

Checklist

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

[artemrys]

@soleksy-splunk can you please review this and merge if you are okay with the change?

[soleksy-splunk]

@soleksy-splunk can you please review this and merge if you are okay with the change?

we can merge that one but as a part of that ticket we agreed to do other modifications as this is an improvement but still does not fix issue that was raised with me.

To solve it we agreed that method getDLRow(currentDataRow) will be added to custom class code and if it is present we pass there current data and we display result in our code base, thanks to that users only handle text modifications and we still keep the same display logic.

@rohanm-crest not sure if you want to include it inside that PR or create a fresh new one. (i'm fine with either)

[soleksy-splunk]

have a look at those comments, not something crucial but imo nice to have. obviously feel free to argue and dismiss comment

[vtsvetkov-splunk]

Don't forget to update the title