Prepare to clang14: fix yql/providers -Wunused-but-set-variable -Wdeprecated-copy

fxi yql/providers/yt/provider -Wunused-but-set-variable

fix yql/providers/rtmr/gateway -Wunused-but-set-variable

fix yql/providers/yt/codec -Wdeprecated-cpoy

1 files changed, 2 insertions, 0 deletions

diff --git a/ydb/library/yql/utils/hash.h b/ydb/library/yql/utils/hash.h
index c903c3454c1..e67da789fd9 100644
--- a/ydb/library/yql/utils/hash.h
+++ b/ydb/library/yql/utils/hash.h
@@ -24,6 +24,8 @@ struct TVaryingHash {
         : Underlying(underlying)
     {}
 
+    TVaryingHash& operator=(const TVaryingHash& other) = default;
+
     size_t operator()(const T& elem) const {
         return VaryingHash(Underlying(elem));
     }