boards: nrf: Update nrf54h and nrf54l yamls to use sysbuild in twister

Nrf54h's and nrf54l's targets are the first targets complex enough
that a sysbuild must be used on every build for them. This information
is reflected in their yamls. These entries tell twister to always use
sysbuild for those targets.

Signed-off-by: Maciej Perkowski <[email protected]>

Author: PerMac

boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpuapp.yaml

@@ -9,6 +9,7 @@ toolchain:
   - gnuarmemb
   - xtools
   - zephyr
+sysbuild: true
 ram: 256
 flash: 296
 supported:

boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpuppr.yaml

@@ -7,6 +7,7 @@ type: mcu
 arch: riscv
 toolchain:
   - zephyr
+sysbuild: true
 ram: 62
 flash: 62
 supported:

boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpuppr_xip.yaml

@@ -7,6 +7,7 @@ type: mcu
 arch: riscv
 toolchain:
   - zephyr
+sysbuild: true
 ram: 62
 flash: 64
 supported:

boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpurad.yaml

@@ -9,6 +9,7 @@ toolchain:
   - gnuarmemb
   - xtools
   - zephyr
+sysbuild: true
 ram: 192
 flash: 256
 supported:

boards/nordic/nrf54l15pdk/nrf54l15pdk_nrf54l15_cpuapp.yaml

@@ -9,6 +9,7 @@ toolchain:
   - gnuarmemb
   - xtools
   - zephyr
+sysbuild: true
 ram: 188
 flash: 324
 supported:

boards/nordic/nrf54l15pdk/nrf54l15pdk_nrf54l15_cpuflpr.yaml

@@ -7,6 +7,7 @@ type: mcu
 arch: riscv
 toolchain:
   - zephyr
+sysbuild: true
 ram: 96
 flash: 96
 supported:

boards/nordic/nrf54l15pdk/nrf54l15pdk_nrf54l15_cpuflpr_xip.yaml

@@ -7,6 +7,7 @@ type: mcu
 arch: riscv
 toolchain:
   - zephyr
+sysbuild: true
 ram: 68
 flash: 96
 supported: