YT-19324: move YT provider to ydb/library/yql

This commit is formed by the following script: https://paste.yandex-team.ru/6f92e4b8-efc5-4d34-948b-15ee2accd7e7/text.
This commit has zero effect on all projects that depend on YQL.

The summary of changes:
- `yql/providers/yt -> ydb/library/yql/providers/yt `- the whole implementation of YT provider is moved into YDB code base for further export as a part of YT YQL plugin shared library;
- `yql/providers/stat/{expr_nodes,uploader} -> ydb/library/yql/providers/stat/{expr_nodes,uploader}` - a small interface without implementation and the description of stat expr nodes;
- `yql/core/extract_predicate/ut -> ydb/library/yql/core/extract_predicate/ut`;
- `yql/core/{ut,ut_common} -> ydb/library/yql/core/{ut,ut_common}`;
- `yql/core` is gone;
- `yql/library/url_preprocessing -> ydb/library/yql/core/url_preprocessing`.

**NB**: all new targets inside `ydb/` are under `IF (NOT CMAKE_EXPORT)` clause which disables them from open-source cmake generation and ya make build. They will be enabled in the subsequent commits.

1 files changed, 41 insertions, 0 deletions

diff --git a/library/cpp/yt/cpu_clock/benchmark/benchmark.cpp b/library/cpp/yt/cpu_clock/benchmark/benchmark.cpp
new file mode 100644
index 0000000000..9d300b6726
--- /dev/null
+++ b/library/cpp/yt/cpu_clock/benchmark/benchmark.cpp
@@ -0,0 +1,41 @@
+#include "benchmark/benchmark.h"
+#include <benchmark/benchmark.h>
+
+#include <library/cpp/yt/cpu_clock/clock.h>
+
+namespace NYT {
+namespace {
+
+////////////////////////////////////////////////////////////////////////////////
+
+void BM_GetCpuInstant(benchmark::State& state)
+{
+    for (auto _ : state) {
+        benchmark::DoNotOptimize(GetCpuInstant());
+    }
+}
+
+BENCHMARK(BM_GetCpuInstant);
+
+void BM_GetCpuApproximateInstant(benchmark::State& state)
+{
+    for (auto _ : state) {
+        benchmark::DoNotOptimize(GetApproximateCpuInstant());
+    }
+}
+
+BENCHMARK(BM_GetCpuApproximateInstant);
+
+void BM_InstantNow(benchmark::State& state)
+{
+    for (auto _ : state) {
+        benchmark::DoNotOptimize(TInstant::Now());
+    }
+}
+
+BENCHMARK(BM_InstantNow);
+
+////////////////////////////////////////////////////////////////////////////////
+
+} // namespace
+} // namespace NYT