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, 36 insertions, 0 deletions

diff --git a/yt/yt/core/logging/log_writer.h b/yt/yt/core/logging/log_writer.h
new file mode 100644
index 0000000000..6737ec379f
--- /dev/null
+++ b/yt/yt/core/logging/log_writer.h
@@ -0,0 +1,36 @@
+#pragma once
+
+#include "public.h"
+
+namespace NYT::NLogging {
+
+////////////////////////////////////////////////////////////////////////////////
+
+struct ILogWriter
+    : public virtual TRefCounted
+{
+    virtual void Write(const TLogEvent& event) = 0;
+    virtual void Flush() = 0;
+
+    virtual void Reload() = 0;
+
+    virtual void SetRateLimit(std::optional<i64> limit) = 0;
+    virtual void SetCategoryRateLimits(const THashMap<TString, i64>& categoryRateLimits) = 0;
+};
+
+DEFINE_REFCOUNTED_TYPE(ILogWriter)
+
+////////////////////////////////////////////////////////////////////////////////
+
+struct IFileLogWriter
+    : public virtual ILogWriter
+{
+    virtual const TString& GetFileName() const = 0;
+    virtual void CheckSpace(i64 minSpace) = 0;
+};
+
+DEFINE_REFCOUNTED_TYPE(IFileLogWriter)
+
+////////////////////////////////////////////////////////////////////////////////
+
+} // namespace NYT::NLogging