YT-19210: expose YQL shared library for YT.

After this, a new target libyqlplugin.so appears. in open-source cmake build.
Diff in open-source YDB repo looks like the following: https://paste.yandex-team.ru/f302bdb4-7ef2-4362-91c7-6ca45f329264

1 files changed, 18 insertions, 0 deletions

diff --git a/library/cpp/yt/logging/backends/arcadia/backend.h b/library/cpp/yt/logging/backends/arcadia/backend.h
new file mode 100644
index 0000000000..251918c972
--- /dev/null
+++ b/library/cpp/yt/logging/backends/arcadia/backend.h
@@ -0,0 +1,18 @@
+#pragma once
+
+#include <library/cpp/yt/logging/public.h>
+
+#include <util/generic/ptr.h>
+
+class TLogBackend;
+
+namespace NYT::NLogging {
+
+////////////////////////////////////////////////////////////////////////////////
+
+//! Create TLogBackend which redirects log messages to |logger|.
+THolder<TLogBackend> CreateArcadiaLogBackend(const TLogger& logger);
+
+////////////////////////////////////////////////////////////////////////////////
+
+} // namespace NYT::NLogging