[fix](function)The json_remove function did not initialize nullmap. (#57995)

### What problem does this PR solve?

This error can occur in this PR
(#57909
```
mysql> SELECT JSON_REMOVE('{"a": 1, "b": 2, "c": 3}', '\$.b');
ERROR 1105 (HY000): errCode = 2, detailMessage = (127.0.0.1)[INVALID_ARGUMENT]null map check failed for column: Const(Nullable(String))
```

Related PR: #xxx

Problem Summary:

### Release note

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    - [x] No need to test or manual test. Explain why:
- [x] This is a refactor/code format and no logic has been changed.
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- [ ] Yes. <!-- Add document PR link here. eg:
apache/doris-website#1214 -->

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Author: Mryange

be/src/vec/functions/function_jsonb.cpp

@@ -2747,7 +2747,7 @@ class FunctionJsonbRemove : public IFunction {
 
         res_chars.reserve(input_rows_count * 64);
         res_offsets.resize(input_rows_count);
-        null_map.resize(input_rows_count);
+        null_map.resize_fill(input_rows_count, 0);
 
         // Get JSON document column
         auto [json_column, json_const] =