[mlir][sve] Canonicalise MLIR_RUN_ARM_SVE_TESTS

[awarzynski]

Summary

Similarly to other CMake variables used to configure LIT tests, this
patch makes sure that MLIR_RUN_ARM_SVE_TESTS is canonicalised. The
corresponding LIT configuration is updated accordingly.

[aartbik]

Even with -DMLIR_RUN_ARM_SVE_TESTS=OFF, this breaks the integration tests. I will send out a fix.

mlir/test/CMakeLists.txt

llvm_canonicalize_cmake_booleans(
   MLIR_ENABLE_ROCM_CONVERSIONS
   MLIR_ENABLE_ROCM_RUNNER
   MLIR_ENABLE_SPIRV_CPU_RUNNER
   MLIR_ENABLE_VULKAN_RUNNER
   MLIR_INCLUDE_INTEGRATION_TESTS
   MLIR_RUN_AMX_TESTS
   MLIR_RUN_CUDA_TENSOR_CORE_TESTS
   MLIR_RUN_X86VECTOR_TESTS
+  MLIR_RUN_ARM_SVE_TESTS
   )
 
 configure_lit_site_cfg(
   ${CMAKE_CURRENT_SOURCE_DIR}/lit.site.cfg.py.in
   ${CMAKE_CURRENT_BINARY_DIR}/lit.site.cfg.py
   MAIN_CONFIG
   ${CMAKE_CURRENT_SOURCE_DIR}/lit.cfg.py
   )

mlir/test/Integration/Dialect/Vector/CPU/ArmSVE/lit.local.cfg

 import sys
 
 # ArmSVE tests must be enabled via build flag.
-if config.mlir_run_arm_sve_tests != 'ON':
+if not config.mlir_run_arm_sve_tests:
     config.unsupported = True
 
 # No JIT on win32.
 if sys.platform == 'win32':
     config.unsupported = True
 
 lli_cmd = 'lli'
 if config.arm_emulator_lli_executable: