fixup! fixup! Mark OpaqueWrappable specializations as final

Author: jasnell

.bazelrc

@@ -134,6 +134,10 @@ build:profile --strip=never
 
 # configuration used for performance benchmarking is the same as profiling for consistency
 build:benchmark --config=profile
+# TODO(soon): Temporarily disable thin-LTO for benchmarks to work around a vtable deduplication
+# issue with final template classes. See https://github.com/cloudflare/workerd/pull/5781
+build:benchmark --copt='-fno-lto'
+build:benchmark --linkopt='-fno-lto'
 
 # Define a debug config which is primarily intended for local development.
 build:debug -c dbg