[indexTable] missing reset.button on indexTable-body-row-cell-link

[BertrandPodevin]

There are cases where indexTable-body-row-cell-link is put on a button instead of a a. When the detail of a row open a modal for example.

In that case the default button styles should be reset by default.

On a sidenote, both .indexTable-body-row-cell-link and .indexTable-body-row-cell-action are marked deprecated in the lf component code