[nrf fromtree] tests: drivers: spi: spi_error_cases: Extend platform_allow list

Add Radio core and PPR core on nrf54h20 DK to platform_allow list.
Required overlays are already present.

Signed-off-by: Sebastian Głąb <[email protected]>
(cherry picked from commit bc2c95c)

Author: nordic-segl

tests/drivers/spi/spi_error_cases/testcase.yaml

@@ -11,8 +11,10 @@ tests:
   drivers.spi.spi_error_cases:
     platform_allow:
       - nrf52840dk/nrf52840
-      - nrf54l15dk/nrf54l15/cpuapp
       - nrf54h20dk/nrf54h20/cpuapp
+      - nrf54h20dk/nrf54h20/cpuppr
+      - nrf54h20dk/nrf54h20/cpurad
+      - nrf54l15dk/nrf54l15/cpuapp
       - nrf54lm20dk/nrf54lm20a/cpuapp
       - ophelia4ev/nrf54l15/cpuapp
     integration_platforms: