tests: lib: cpp: cxx: ignore nRF54H20 DK 0.8.0

nRF54H HAL is not compatible with C++98, add new board revisions to the
list so that they are skipped.

Signed-off-by: Gerard Marull-Paretas <gerard@teslabs.com>

Author: gmarull

tests/lib/cpp/cxx/testcase.yaml

@@ -42,6 +42,8 @@ tests:
       - nrf54l20pdk/nrf54l20/cpuapp
       - nrf54h20dk/nrf54h20/cpuapp
       - nrf54h20dk/nrf54h20/cpurad
+      - nrf54h20dk@0.8.0/nrf54h20/cpuapp
+      - nrf54h20dk@0.8.0/nrf54h20/cpurad
       - nrf9280pdk/nrf9280/cpuapp
       - nrf9280pdk/nrf9280/cpurad
     filter: not CONFIG_HAS_RENESAS_RA_FSP