feat(query): support json_object_insert function

[b41sh]

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Summary

support json_object_insert function
for example:

MySQL [(none)]> SELECT json_object_insert('{"a":1,"b":2}'::variant, 'c', 3);
+------------------------------------------------------+
| json_object_insert('{"a":1,"b":2}'::VARIANT, 'c', 3) |
+------------------------------------------------------+
| {"a":1,"b":2,"c":3}                                  |
+------------------------------------------------------+
1 row in set (0.043 sec)

MySQL [(none)]> SELECT json_object_insert('{"city":"San Mateo","state":"CA"}'::variant, 'city', 'San Jose', true);
+--------------------------------------------------------------------------------------------+
| json_object_insert('{"city":"San Mateo","state":"CA"}'::VARIANT, 'city', 'San Jose', TRUE) |
+--------------------------------------------------------------------------------------------+
| {"city":"San Jose","state":"CA"}                                                           |
+--------------------------------------------------------------------------------------------+
1 row in set (0.040 sec)

• fixes: #[Link the issue here]

Tests

• Unit Test
• Logic Test
• Benchmark Test
• No Test - Explain why

Type of change

• Bug Fix (non-breaking change which fixes an issue)
• New Feature (non-breaking change which adds functionality)
• Breaking Change (fix or feature that could cause existing functionality not to work as expected)
• Documentation Update
• Refactoring
• Performance Improvement
• Other (please describe):

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This change is