modules: hal_nordic: defines NRF_CONFIG_NFCT_PINS_AS_GPIOS for nRF54L15

Currently, the NFCT pins cannot be used as GPIOs on the nRF54L15 MCU
because the Nordic HAL for this MCU uses the new upcoming `NRF_CONFIG_`
style configuration settings for this MCU.
To support all nRF5x MCUs, the old configuration is still required
because Nordic didn't update their MDK entirely to the new style.

Signed-off-by: Stefan Schwendeler <Stefan.Schwendeler@husqvarnagroup.com>