Fix compiler errors i introduced under clang-cl

remove xe_kernel_export_shim_fn field of Export function_data, trampoline is now the only way exports get invoked
Remove kernelstate argument from string functions in order to conform to the trampoline signature (the argument was unused anyway)
Constant-evaluated initialization of ppc_opcode_disasm_table, removal of unused std::vector fields
Constant-evaluated initialization of export tables
name field on export is just a const char* now, only immutable static strings are ever passed to it
Remove unused callcount field of export.
PM4 compare op function extracted
Globally apply /Oy, /GS-, /Gw on msvc windows
Remove imgui testwindow code call, it took up like 300 kb

src/xenia/kernel/user_module.cc

@@ -783,7 +783,7 @@ void UserModule::Dump() {
           }
         }
         if (kernel_export &&
-            kernel_export->type == cpu::Export::Type::kVariable) {
+            kernel_export->get_type() == cpu::Export::Type::kVariable) {
           sb.AppendFormat("   V {:08X}          {:03X} ({:4}) {} {}\n",
                           info->value_address, info->ordinal, info->ordinal,
                           implemented ? "  " : "!!", name);