add some cases

Author: taiyang-li

tests/performance/rewrite_aggregate_if.xml

@@ -1,4 +1,7 @@
 <test>
     <query>select count(if(rand() % 2 = 0, 1, null)) from numbers(100000000) settings optimize_rewrite_aggregate_function_with_if = true</query>
     <query>select count(if(rand() % 2 = 0, null, 1)) from numbers(100000000) settings optimize_rewrite_aggregate_function_with_if = true</query>
+
+    <query>select count(if(rand() % 2 = 0, toNullable(1), null)) from numbers(100000000) settings optimize_rewrite_aggregate_function_with_if = true</query>
+    <query>select count(if(rand() % 2 = 0, null, toNullable(1))) from numbers(100000000) settings optimize_rewrite_aggregate_function_with_if = true</query>
 </test>