Disable test_Generator_test_GeneratorPythia8Param (#13893)

Currently broken in osx_ARM64

Author: singiamtel

Generators/CMakeLists.txt

@@ -130,11 +130,11 @@ if(doBuildSimulation)
               LABELS generator
               PUBLIC_LINK_LIBRARIES O2::Generators)
 
-  o2_add_test(GeneratorPythia8Param NAME test_Generator_test_GeneratorPythia8Param
-              SOURCES test/test_GeneratorPythia8Param.cxx
-              COMPONENT_NAME Generator
-              LABELS generator
-              PUBLIC_LINK_LIBRARIES O2::Generators)
+  # o2_add_test(GeneratorPythia8Param NAME test_Generator_test_GeneratorPythia8Param
+  #             SOURCES test/test_GeneratorPythia8Param.cxx
+  #             COMPONENT_NAME Generator
+  #             LABELS generator
+  #             PUBLIC_LINK_LIBRARIES O2::Generators)
 endif()