tests: arch: arm64: arm64_high_address: Exclude Renesas EK-RZ/A3M

Exclude EK-RZ/A3M board as the redefined CONFIG_SRAM_BASE_ADDRESS
degrades the BUILD_OUTPUT_ADJUST_LMA option that will generate a bin
file >10GB

Signed-off-by: Nhut Nguyen <[email protected]>

Author: nhutnguyenkc

tests/arch/arm64/arm64_high_addresses/testcase.yaml

@@ -2,6 +2,7 @@ common:
   arch_allow: arm64
   platform_exclude:
     - rza3ul_smarc
+    - rza3m_ek
   tags:
     - arm
     - userspace