Apply clang-tidy fixes for llvm-namespace-comment in TestDialectInterfaces.cpp (NFC)

Author: joker-eph

mlir/test/lib/Dialect/Test/TestDialectInterfaces.cpp

@@ -39,7 +39,7 @@ struct TestResourceBlobManagerInterface
 
 namespace {
 enum test_encoding { k_attr_params = 0, k_test_i32 = 99 };
-}
+} // namespace
 
 // Test support for interacting with the Bytecode reader/writer.
 struct TestBytecodeDialectInterface : public BytecodeDialectInterface {