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, 22 insertions, 0 deletions

diff --git a/yt/cpp/mapreduce/client/init.h b/yt/cpp/mapreduce/client/init.h
new file mode 100644
index 00000000000..af2fc80e552
--- /dev/null
+++ b/yt/cpp/mapreduce/client/init.h
@@ -0,0 +1,22 @@
+#pragma once
+
+#include <yt/cpp/mapreduce/interface/init.h>
+
+namespace NYT {
+namespace NDetail {
+
+////////////////////////////////////////////////////////////////////////////////
+
+enum class EInitStatus : int
+{
+    NotInitialized,
+    JoblessInitialization,
+    FullInitialization,
+};
+
+EInitStatus& GetInitStatus();
+
+////////////////////////////////////////////////////////////////////////////////
+
+} // namespace NDetail
+} // namespace NYT