Excluded sub-component id in newState when handling selection in Table

[smmr-dn]

Changes

As the only difference between these two types of data is the Symbol key to mark whether the row is a sub-component or not, onSelect turned out to return duplicate data. This PR excluded the data of sub-component from the returned selected data from the onSelect function as it was the same as that of the main row, as reported in issue.

I have gone through react-table v7 source code and observed that other functionalities should not affect by sub-components being sub-rows. Even though sorting and filtering still loop through sub-rows, these functionalities only utilize the data for their logic but not return it as their resulting data. Additionally, the sub-components' data should be the same that of the main rows, which does not affect the logic of these functionalities.

Testing

Added unit test for row selecting when subComponent is present.

Docs

Added changeset.

After-PR TODO:

• Used initialSubRows instead of subRows (Excluded sub-component id in newState when handling selection in Table #2317 (comment))

[mayank99]

LGTM.

Would be worth mentioning in the PR description that you looked through the react-table source code to verify that no other places use sub-rows (iirc filters do but it was ok?)