tests: subsys: fs: Update test configuration for Renesas RA

Remove redundant "partition" and "slot1_partition" nodes that are not
needed and conflict with the MRAM device node labeled "mram" on
Renesas RA boards. These conflicts caused build errors.

For the affected board overlays, the SDHC and SDMMC nodes are now
enabled at the board or shield layer, so they no longer need to be
defined in the test configuration.

Signed-off-by: Khoa Tran <khoa.tran.yj@bp.renesas.com>
7 files changed