Revert of YdbTracer methods

Author: alex268

jdbc/src/main/java/tech/ydb/jdbc/YdbTracer.java

@@ -1,5 +1,7 @@
 package tech.ydb.jdbc;
 
+import tech.ydb.jdbc.impl.YdbTracerImpl;
+
 
 
 /**
@@ -15,6 +17,14 @@ default void clear() {
         }
     }
 
+    static YdbTracer current() {
+        return YdbTracerImpl.ENABLED.get();
+    }
+
+    static void clear() {
+        YdbTracerImpl.ENABLED.clear();
+    }
+
     void setId(String id);
 
     void trace(String message);