fatcat: add locales and rtl configuration

Added the standard list of essential locales and RTL support for the
fatcat board configuration.

BUG=b:502842015
TEST=Able to emerge-fatcat.

Change-Id: I38707e2fcd83c4efc991c2017578c10678be7d3c
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/bmpblk/+/7775630
Auto-Submit: Subrata Banik <subratabanik@chromium.org>
Reviewed-by: Pranava Y N <pranavayn@google.com>
Tested-by: Subrata Banik <subratabanik@chromium.org>
GitOrigin-RevId: ac9c235abfb66f72d3709d09846d7911a074b837