[Review] Use AMD_COMGR_CACHE instead of AMD_COMGR_CACHE_DIR to disable the cache in the tests

Author: jmmartinez

amd/comgr/test-lit/lit.cfg.py

@@ -17,4 +17,4 @@
 
 # By default, disable the cache for the tests.
 # Test for the cache must explicitly enable this variable.
-config.environment['AMD_COMGR_CACHE_DIR'] = ""
+config.environment['AMD_COMGR_CACHE'] = "0"

amd/comgr/test/CMakeLists.txt

@@ -195,10 +195,10 @@ endif()
   # include the .lib/.dll directory.
   if (UNIX)
     set_tests_properties(${test_name}
-      PROPERTIES ENVIRONMENT "AMD_COMGR_CACHE_DIR=;")
+      PROPERTIES ENVIRONMENT "AMD_COMGR_CACHE=0;")
   else()
     set_tests_properties(${test_name}
-      PROPERTIES ENVIRONMENT "PATH=$<TARGET_LINKER_FILE_DIR:amd_comgr>;AMD_COMGR_CACHE_DIR=;")
+      PROPERTIES ENVIRONMENT "PATH=$<TARGET_LINKER_FILE_DIR:amd_comgr>;AMD_COMGR_CACHE=0;")
   endif()
 endmacro()