I am using `nullIf` in aggregations to skip unwanted empty strings. Strangely enough `any` function picks `NULL`s resulting from `nullIf`, i.e. does skip them as it should do with NULLs.

### Minimal reproducing code
```sql
select any(nullIf('', ''), 'some text');
```
produces:
```
┌─nullIf('', '')─┐
│ ᴺᵁᴸᴸ           │
└────────────────┘
```

**Expected behavior**
This should return 'Some text'

### Other example with table
```sql
create temporary table vv (m Nullable(String));
insert into vv (*) values (''), ('Some text');
select any(nullIf(m, '')) from vv;
```
result:
```
┌─nullIf(any(m), '')─┐
│ ᴺᵁᴸᴸ               │
└────────────────────┘
```
expecting 'Some text' as before
\
    M(UInt64, max_result_rows, 0, "Limit on result size in rows. Also checked for intermediate data sent from remote servers.", 0) \
    M(UInt64, max_result_bytes, 0, "Limit on result size in bytes (uncompressed). Also checked for intermediate data sent from remote servers.", 0) \
    M(OverflowMode, result_overflow_mode, OverflowMode::THROW, "What to do when the limit is exceeded.", 0) \
    \
    /* TODO: Check also when merging and finalizing aggregate functions. */ \
    M(Seconds, max_execution_time, 0, "", 0) \
    M(OverflowMode, timeout_overflow_mode, OverflowMode::THROW, "What to do when the limit is exceeded.", 0) \
    \
    M(UInt64, min_execution_speed, 0, "Minimum number of execution rows per second.", 0) \
    M(UInt64, max_execution_speed, 0, "Maximum number of execution rows per second.", 0) \
    M(UInt64, min_execution_speed_bytes, 0, "Minimum number of execution bytes per second.", 0) \
    M(UInt64, max_execution_speed_bytes, 0, "Maximum number of execution bytes per second.", 0) \
    M(Seconds, timeout_before_checking_execution_speed, 10, "Check that the speed is not too low after the specified time has elapsed.", 0) \
    \
    M(UInt64, max_columns_to_read, 0, "", 0) \
    M(UInt64, max_temporary_columns, 0, "", 0) \
    M(UInt64, max_temporary_non_const_columns, 0, "", 0) \
    \
    M(UInt64, max_subquery_depth, 100, "", 0) \
    M(UInt64, max_pipeline_depth, 1000, "", 0) \
    M(UInt64, max_ast_depth, 1000, "Maximum depth of query syntax tree. Checked after parsing.", 0) \
    M(UInt64, max_ast_elements, 50000, "Maximum size of query syntax tree in number of nodes. Checked after parsing.", 0) \
    M(UInt64, max_expanded_ast_elements, 500000, "Maximum size of query syntax tree in number of nodes after expansion of aliases and the asterisk.", 0) \
    \
    M(UInt64, readonly, 0, "0 - everything is allowed. 1 - only read requests. 2 - only read requests, as well as changing settings, except for the 'readonly' setting.", 0) \
    \
    M(UInt64, max_rows_in_set, 0, "Maximum size of the set (in number of elements) resulting from the execution of the IN section.", 0) \
    M(UInt64, max_bytes_in_set, 0, "Maximum size of the set (in bytes in memory) resulting from the execution of the IN section.", 0) \
    M(OverflowMode, set_overflow_mode, OverflowMode::THROW, "What to do when the limit is exceeded.", 0) \