[MLAS] Fix SVE enabled pipeline break (#26203)

### Description
The `MLAS_USE_SVE` macro was missing for some unittests/benchmark
targets. In the original PR, it was scoped down to just the mlas target
and this resulted in different mlas platform struct definitions across
targets.

### Motivation and Context
Fix pipeline crash and unblock daily pipeline run
#25238 (change that introduced the issue)

Author: hariharans29

cmake/onnxruntime_unittests.cmake

@@ -1325,6 +1325,9 @@ if (NOT onnxruntime_ENABLE_TRAINING_TORCH_INTEROP)
       ${BENCHMARK_DIR}/layer_normalization.cc)
     target_include_directories(onnxruntime_benchmark PRIVATE ${ONNXRUNTIME_ROOT} ${onnxruntime_graph_header} ${ONNXRUNTIME_ROOT}/core/mlas/inc)
     target_compile_definitions(onnxruntime_benchmark PRIVATE BENCHMARK_STATIC_DEFINE)
+    if (onnxruntime_USE_SVE)
+      target_compile_definitions(onnxruntime_benchmark PRIVATE MLAS_USE_SVE)
+    endif()
     if(WIN32)
       target_compile_options(onnxruntime_benchmark PRIVATE "$<$<COMPILE_LANGUAGE:CUDA>:SHELL:--compiler-options /wd4141>"
                         "$<$<NOT:$<COMPILE_LANGUAGE:CUDA>>:/wd4141>")
@@ -1352,6 +1355,9 @@ if (NOT onnxruntime_ENABLE_TRAINING_TORCH_INTEROP)
     target_include_directories(onnxruntime_mlas_benchmark PRIVATE ${ONNXRUNTIME_ROOT}/core/mlas/inc)
     target_link_libraries(onnxruntime_mlas_benchmark PRIVATE benchmark::benchmark onnxruntime_util ${ONNXRUNTIME_MLAS_LIBS} onnxruntime_common ${CMAKE_DL_LIBS})
     target_compile_definitions(onnxruntime_mlas_benchmark PRIVATE BENCHMARK_STATIC_DEFINE)
+    if (onnxruntime_USE_SVE)
+      target_compile_definitions(onnxruntime_mlas_benchmark PRIVATE MLAS_USE_SVE)
+    endif()
     if(WIN32)
       target_link_libraries(onnxruntime_mlas_benchmark PRIVATE debug Dbghelp)
       # Avoid using new and delete. But this is a benchmark program, it's ok if it has a chance to leak.
@@ -1649,6 +1655,9 @@ endif()
         XCODE_ATTRIBUTE_CODE_SIGNING_ALLOWED "NO"
       )
     endif()
+    if (onnxruntime_USE_SVE)
+      target_compile_definitions(onnxruntime_mlas_test PRIVATE MLAS_USE_SVE)
+    endif()
     target_include_directories(onnxruntime_mlas_test PRIVATE ${ONNXRUNTIME_ROOT}/core/mlas/inc ${ONNXRUNTIME_ROOT}
             ${CMAKE_CURRENT_BINARY_DIR})
     target_link_libraries(onnxruntime_mlas_test PRIVATE GTest::gtest GTest::gmock ${ONNXRUNTIME_MLAS_LIBS} onnxruntime_common)