driconf: add force_integer_tex_nearest option

And enable it for "GRID Autosport" and "DIRT: Showdown" games.

CC: 20.1 <mesa-stable@lists.freedesktop.org>
Closes: #1258Reviewed-by: Timothy Arceri's avatarTimothy Arceri <tarceri@itsqueeze.com>
Reviewed-by: default avatarMarek Olšák <marek.olsak@amd.com>
Part-of: <!4647>
parent 12fb7d70
Pipeline #142042 passed with stages
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