split factor increased to avoid tests interaction by timeout (#8728)

ydb/core/kqp/ut/olap/ya.make

@@ -1,7 +1,7 @@
 UNITTEST_FOR(ydb/core/kqp)
 
 FORK_SUBTESTS()
-SPLIT_FACTOR(100)
+SPLIT_FACTOR(200)
 
 IF (WITH_VALGRIND)
     TIMEOUT(3600)