hashtest: better support for Sapphire and Granite Rapids

These chips add the SGX_ENCLV extension, which presents challenges similar to the SGX extension.

The simplest solution is to filter the entire SGX category rather than just the extension.

PiperOrigin-RevId: 665540689

fuzzer/hashtest/prefilter.cc

@@ -103,7 +103,7 @@ bool PrefilterInstruction(const xed_inst_t* instruction) {
 
   // SGX is unlikely to be enabled, and if it was we wouldn't want to deal with
   // these instructions.
-  if (extension == XED_EXTENSION_SGX) {
+  if (category == XED_CATEGORY_SGX) {
     return false;
   }