fix some mini_table function names to match the upb style guide:
 upb_MiniTable_BuildEnum() -> upb_MiniTableEnum_Build()
 upb_MiniTable_BuildExtension() -> upb_MiniTableExtension_Build()
also make the status pointer argument optional for the mini table builders

PiperOrigin-RevId: 490992866
diff --git a/upb/fuzz_test_util.h b/upb/fuzz_test_util.h
index 4e1e968..95a31fa 100644
--- a/upb/fuzz_test_util.h
+++ b/upb/fuzz_test_util.h
@@ -43,11 +43,11 @@
   std::vector<std::string> mini_descriptors;
 
   // MiniDescripotrs for N enums, in the format accepted by
-  // upb_MiniTable_BuildEnum().
+  // upb_MiniTableEnum_Build().
   std::vector<std::string> enum_mini_descriptors;
 
   // A MiniDescriptor for N extensions, in the format accepted by
-  // upb_MiniTable_BuildExtension().
+  // upb_MiniTableExtension_Build().
   std::string extensions;
 
   // Integer indexes into the message or enum mini tables lists.  These specify