[FEATURE] Add json_delete function to PPL

[acarbonetto]

Is your feature request related to a problem?

As part of the RFC to add JSON functions, the json_delete function would be useful to remove elements from json documents by key.

• META RFC: [META]Add PPL JSON extended functions support #3027
• PPL RFC: [RFC] Add PPL JSON extended functions support #3028
• Related Spark PPL PR: Support PPL JSON functions: construction and extraction opensearch-spark#780

What solution would you like?

### `JSON_DELETE`

**Description**

`json_delete(doc, path [, path]...)` Deletes json elements from a json document at the specified path(s). Returns the updated document.

**Arguments type:** JSON_OBJECT, STRING

**Return type:** JSON_OBJECT

`json_delete(doc, paths)` Deletes json elements from a json document at the specified paths. Returns the updated document.

**Arguments type:** JSON_OBJECT, ARRAY

**Return type:** JSON_OBJECT

Example:

    os> source=people | eval deleted = json_delete(json('{"account_number":1,"balance":39225,"age":32,"gender":"M"}'), array('age','gender')) | head 1 | fields deleted 
    fetched rows / total rows = 1/1
    +------------------------------------------+
    | deleted                                  |
    +-----------------------------------------+
    |{"account_number":1,"balance":39225}     |
    +-----------------------------------------+

    os> source=people | eval deleted = json_delete(json('{"f1":"abc","f2":{"f3":"a","f4":"b"}}'), 'f2.f3') | head 1 | fields deleted
    fetched rows / total rows = 1/1
    +-----------------------------------------------------------+
    | deleted                                                   |
    +-----------------------------------------------------------+
    | {"f1":"abc","f2":{"f4":"b"}}                              |
    +-----------------------------------------------------------+

    os> source=people | eval deleted =  json_delete(json('{"teacher":"Alice","student":[{"name":"Bob","rank":1},{"name":"Charlie","rank":2}]}'), 'teacher', 'student.rank') | head 1 | fields deleted
    fetched rows / total rows = 1/1
    +--------------------------------------------------+
    | deleted                                          |
    +--------------------------------------------------+
    |{"student":[{"name":"Bob"},{"name":"Charlie"}]}   |
    +--------------------------------------------------+

What alternatives have you considered?

N/A

Do you have any additional context?

opensearch-project/opensearch-spark#780 - PR to add json functions to spark ppl